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note
	description: "[
		EiffelVision2 rich text. Windows implementation.
	]"
	legal: "See notice at end of class."
	status: "See notice at end of class."
	date: "$Date: 2018-12-18 02:03:05 -0900 (Tue, 18 Dec 2018) $"
	revision: "$Revision: 102624 $"

class interface
	EV_RICH_TEXT_IMP

create 
	make
			-- Initialize Current.
		require -- from  EV_ANY_I
			True
		ensure -- from EV_ANY_I
			is_initialized: get_state_flag (Is_initialized_flag)

feature -- Initialization

	default_ex_style: INTEGER_32
			-- Extended windows style used to create Current.
		require -- from  WEL_WINDOW
			True

	Default_style: INTEGER_32
			-- Default style used to create the control
		require -- from  WEL_WINDOW
			True
		require -- from  EV_WIDGET_IMP
			True

	initialize_text_widget
			-- Initialize text widget.

	make
			-- Initialize Current.
		require -- from  EV_ANY_I
			True
		ensure -- from EV_ANY_I
			is_initialized: get_state_flag (Is_initialized_flag)

	old_make (an_interface: attached like interface)
			-- Create underlying native toolkit objects.
			-- Every descendant should exactly one a creation procedure `make`.
			-- Must call base_make.
		require -- from EV_ANY_I
			an_interface_not_void: an_interface /= Void
		ensure -- from EV_ANY_I
			interface_assigned: interface = an_interface
			base_make_called: base_make_called

	set_default_minimum_size
			-- Called after creation. Set current size and
			-- notify parent.
			-- (from EV_TEXT_COMPONENT_IMP)

	tooltip: STRING_32
			-- Text of tooltip assigned to Current.
			-- (from EV_WEL_TOOLTIPABLE)
		require -- from  EV_TOOLTIPABLE_I
			True
	
feature -- Access

	accept_cursor: detachable EV_POINTER_STYLE
			-- Accept cursor set by user.
			-- To be displayed when the screen pointer is over a target that accepts
			-- `pebble` during pick and drop.
			-- (from EV_PICK_AND_DROPABLE_I)

	actual_drop_target_agent: detachable FUNCTION [INTEGER_32, INTEGER_32, detachable EV_ABSTRACT_PICK_AND_DROPABLE]
			-- Overrides default drop target on a certain position.
			-- If Void, will use the default drop target.
			-- Always void if Current is not a widget.
			-- (from EV_WIDGET_I)

	Aspect_x: INTEGER_32 = 40
			-- Relative width of a device pixel
			-- used for line drawing
			-- (from WEL_CAPABILITIES_CONSTANTS)

	Aspect_x_y: INTEGER_32 = 44
			-- Diagonal width of a device pixel
			-- used for line drawing
			-- (from WEL_CAPABILITIES_CONSTANTS)

	Aspect_y: INTEGER_32 = 42
			-- Relative height of a device pixel
			-- used for line drawing
			-- (from WEL_CAPABILITIES_CONSTANTS)

	awaiting_movement: BOOLEAN
			-- Are we currently awaiting the movement threshold to
			-- be reached for as drag and drop or dockable move?
			-- (from EV_SHARED_TRANSPORT_IMP)

	frozen background_color: EV_COLOR
			-- Color displayed behind foreground features.
			-- (from EV_COLORIZABLE_I)

	Bits_pixel: INTEGER_32 = 12
			-- Number of adjacent color bits for each pixel
			-- (from WEL_CAPABILITIES_CONSTANTS)

	c_local_lock (handle: POINTER): POINTER
			-- (from WEL_LOCK)

	c_local_unlock (handle: POINTER)
			-- (from WEL_LOCK)

	capture_enabled: BOOLEAN
			-- Is the mouse currently captured?
			-- See constants Capture_xxxx at the end of the class.
			-- (from EV_PICK_AND_DROPABLE_IMP)

	Cfe_autobackcolor: INTEGER_32 = 67108864
			-- The text background color is the value
			-- of the containing control.
			-- (from WEL_CFE_CONSTANTS)

	Cfe_autocolor: INTEGER_32 = 1073741824
			-- The text color is the return value of
			-- GetSysColor (COLOR_WINDOWTEXT).
			-- (from WEL_CFE_CONSTANTS)

	Cfe_bold: INTEGER_32 = 1
			-- Characters are bold.
			-- (from WEL_CFE_CONSTANTS)

	Cfe_italic: INTEGER_32 = 2
			-- Characters are italic.
			-- (from WEL_CFE_CONSTANTS)

	Cfe_protected: INTEGER_32 = 16
			-- Characters are protected; an attempt to modify them
			-- will cause an EN_PROTECTED notification message.
			-- (from WEL_CFE_CONSTANTS)

	Cfe_strikeout: INTEGER_32 = 8
			-- Characters are struck out.
			-- (from WEL_CFE_CONSTANTS)

	Cfe_underline: INTEGER_32 = 4
			-- Characters are underlined.
			-- (from WEL_CFE_CONSTANTS)

	Cfm_backcolor: INTEGER_32 = 67108864
			-- The crBackColor member is valid
			-- (from WEL_CFM_CONSTANTS)

	Cfm_bold: INTEGER_32 = 1
			-- The CFE_BOLD value of the dwEffects member is valid.
			-- (from WEL_CFM_CONSTANTS)

	Cfm_charset: INTEGER_32 = 134217728
			-- The bCharSet member is valid.
			-- (from WEL_CFM_CONSTANTS)

	Cfm_color: INTEGER_32 = 1073741824
			-- The crTextColor member and the CFE_AUTOCOLOR value
			-- of the dwEffects member are valid.
			-- (from WEL_CFM_CONSTANTS)

	Cfm_face: INTEGER_32 = 536870912
			-- The szFaceName member is valid.
			-- (from WEL_CFM_CONSTANTS)

	Cfm_italic: INTEGER_32 = 2
			-- The CFE_ITALIC value of the dwEffects member is
			-- valid.
			-- (from WEL_CFM_CONSTANTS)

	Cfm_offset: INTEGER_32 = 268435456
			-- The yOffset member is valid.
			-- (from WEL_CFM_CONSTANTS)

	Cfm_protected: INTEGER_32 = 16
			-- The CFE_PROTECTED value of the dwEffects member is
			-- valid.
			-- (from WEL_CFM_CONSTANTS)

	Cfm_revauthor: INTEGER_32 = 32768
			-- The bRevAuthor member is valid.
			-- (from WEL_CFM_CONSTANTS)

	Cfm_size: INTEGER_32 = -2147483648
			-- The size member is valid.
			-- (from WEL_CFM_CONSTANTS)

	Cfm_spacing: INTEGER_32 = 2097152
			-- The sSpacing member is valid.
			-- (from WEL_CFM_CONSTANTS)

	Cfm_strikeout: INTEGER_32 = 8
			-- The CFE_STRIKEOUT value of the dwEffects member is
			-- valid.
			-- (from WEL_CFM_CONSTANTS)

	Cfm_underline: INTEGER_32 = 4
			-- The CFE_UNDERLINE value of the dwEffects member is
			-- valid.
			-- (from WEL_CFM_CONSTANTS)

	Cfm_underlinetype: INTEGER_32 = 8388608
			-- The bUnderlineType member is valid.
			-- (from WEL_CFM_CONSTANTS)

	Cfm_weight: INTEGER_32 = 4194304
			-- The wWeight member is valid.
			-- (from WEL_CFM_CONSTANTS)

	Clip_caps: INTEGER_32 = 36
			-- See class WEL_CLIPPING_CAPABILITIES_CONSTANTS
			-- (from WEL_CAPABILITIES_CONSTANTS)

	Color_3ddkshadow: INTEGER_32 = 21
			-- Dark shadow for three-dimensional display elements.
			--
			-- Declared in Windows as COLOR_3DDKSHADOW
			-- (from WEL_COLOR_CONSTANTS)

	Color_3dface: INTEGER_32 = 15
			-- Face color for three-dimensional display elements and
			-- for dialog box backgrounds.
			--
			-- Declared in Windows as COLOR_3DFACE
			-- Was declared in {WEL_COLOR_CONSTANTS} as synonym of `color_btnface`.
			-- (from WEL_COLOR_CONSTANTS)

	Color_3dhighlight: INTEGER_32 = 20
			-- Highlight color for three-dimensional display elements
			-- (for edges facing the light source.)
			--
			-- Declared in Windows as COLOR_3DHILIGHT
			-- Was declared in {WEL_COLOR_CONSTANTS} as synonym of `color_3dhilight`, `color_btnhilight` and `color_btnhighlight`.
			-- (from WEL_COLOR_CONSTANTS)

	Color_3dhilight: INTEGER_32 = 20
			-- Highlight color for three-dimensional display elements
			-- (for edges facing the light source.)
			--
			-- Declared in Windows as COLOR_3DHILIGHT
			-- Was declared in {WEL_COLOR_CONSTANTS} as synonym of `color_3dhighlight`, `color_btnhilight` and `color_btnhighlight`.
			-- (from WEL_COLOR_CONSTANTS)

	Color_3dlight: INTEGER_32 = 22
			-- Light color for three-dimensional display elements
			-- (for edges facing the light source.)
			--
			-- Declared in Windows as COLOR_3DLIGHT
			-- (from WEL_COLOR_CONSTANTS)

	Color_3dshadow: INTEGER_32 = 16
			-- Shadow color for three-dimensional display elements
			-- (for edges facing away from the light source).
			--
			-- Declared in Windows as COLOR_3DSHADOW
			-- Was declared in {WEL_COLOR_CONSTANTS} as synonym of `color_btnshadow`.
			-- (from WEL_COLOR_CONSTANTS)

	Color_activeborder: INTEGER_32 = 10
			-- Active window border.
			--
			-- Declared in Windows as COLOR_ACTIVEBORDER
			-- (from WEL_COLOR_CONSTANTS)

	Color_activecaption: INTEGER_32 = 2
			-- Active window title bar. 
			--
			-- Windows 98/Me, Windows 2000 or later:
			--   Specifies the left side color in the color gradient of an active
			--   window's title bar if the gradient effect is enabled.
			--
			-- Declared in Windows as COLOR_ACTIVECAPTION
			-- (from WEL_COLOR_CONSTANTS)

	Color_appworkspace: INTEGER_32 = 12
			-- Background color of multiple document interface (MDI) applications.
			--
			-- Declared in Windows as COLOR_APPWORKSPACE
			-- (from WEL_COLOR_CONSTANTS)

	Color_background: INTEGER_32 = 1
			-- Desktop.
			--
			-- Declared in Windows as COLOR_BACKGROUND
			-- Was declared in {WEL_COLOR_CONSTANTS} as synonym of `color_desktop`.
			-- (from WEL_COLOR_CONSTANTS)

	Color_btnface: INTEGER_32 = 15
			-- Face color for three-dimensional display elements and
			-- for dialog box backgrounds.
			--
			-- Declared in Windows as COLOR_3DFACE
			-- Was declared in {WEL_COLOR_CONSTANTS} as synonym of `color_3dface`.
			-- (from WEL_COLOR_CONSTANTS)

	Color_btnhighlight: INTEGER_32 = 20
			-- Highlight color for three-dimensional display elements
			-- (for edges facing the light source.)
			--
			-- Declared in Windows as COLOR_3DHILIGHT
			-- Was declared in {WEL_COLOR_CONSTANTS} as synonym of `color_3dhilight`, `color_3dhighlight` and `color_btnhilight`.
			-- (from WEL_COLOR_CONSTANTS)

	Color_btnhilight: INTEGER_32 = 20
			-- Highlight color for three-dimensional display elements
			-- (for edges facing the light source.)
			--
			-- Declared in Windows as COLOR_3DHILIGHT
			-- Was declared in {WEL_COLOR_CONSTANTS} as synonym of `color_3dhilight`, `color_3dhighlight` and `color_btnhighlight`.
			-- (from WEL_COLOR_CONSTANTS)

	Color_btnshadow: INTEGER_32 = 16
			-- Shadow color for three-dimensional display elements
			-- (for edges facing away from the light source).
			--
			-- Declared in Windows as COLOR_3DSHADOW
			-- Was declared in {WEL_COLOR_CONSTANTS} as synonym of `color_3dshadow`.
			-- (from WEL_COLOR_CONSTANTS)

	Color_btntext: INTEGER_32 = 18
			-- Text on push buttons.
			--
			-- Declared in Windows as COLOR_BTNTEXT
			-- (from WEL_COLOR_CONSTANTS)

	Color_captiontext: INTEGER_32 = 9
			-- Text in caption, size box, and scroll bar arrow box.
			--
			-- Declared in Windows as COLOR_CAPTIONTEXT
			-- (from WEL_COLOR_CONSTANTS)

	Color_desktop: INTEGER_32 = 1
			-- Desktop.
			--
			-- Declared in Windows as COLOR_BACKGROUND
			-- Was declared in {WEL_COLOR_CONSTANTS} as synonym of `color_background`.
			-- (from WEL_COLOR_CONSTANTS)

	Color_gradientactivecaption: INTEGER_32 = 27
			-- Windows 98/Me, Windows 2000 or later:
			--   Right side color in the color gradient of an active window's
			--   title bar. COLOR_ACTIVECAPTION specifies the left side color.
			--   Use SPI_GETGRADIENTCAPTIONS with the SystemParametersInfo
			--   function to determine whether the gradient effect is enabled.
			--
			-- Declared in Windows as COLOR_GRADIENTACTIVECAPTION
			-- (from WEL_COLOR_CONSTANTS)

	Color_gradientinactivecaption: INTEGER_32 = 28
			-- Windows 98/Me, Windows 2000 or later:
			--   Right side color in the color gradient of an inactive window's
			--   title bar. COLOR_INACTIVECAPTION specifies the left side color.
			--
			-- Declared in Windows as COLOR_GRADIENTINACTIVECAPTION
			-- (from WEL_COLOR_CONSTANTS)

	Color_graytext: INTEGER_32 = 17
			-- Grayed (disabled) text. This color is set to 0 if the current
			-- display driver does not support a solid gray color.
			--
			-- Declared in Windows as COLOR_GRAYTEXT
			-- (from WEL_COLOR_CONSTANTS)

	Color_highlight: INTEGER_32 = 13
			-- Item(s) selected in a control.
			--
			-- Declared in Windows as COLOR_HIGHLIGHT
			-- (from WEL_COLOR_CONSTANTS)

	Color_highlighttext: INTEGER_32 = 14
			-- Text of item(s) selected in a control.
			--
			-- Declared in Windows as COLOR_HIGHLIGHTTEXT
			-- (from WEL_COLOR_CONSTANTS)

	Color_hotlight: INTEGER_32 = 26
			-- Windows 98/Me, Windows 2000 or later:
			--   Color for a hot-tracked item. Single clicking a hot-tracked
			--   item executes the item.
			--
			-- Declared in Windows as COLOR_HOTLIGHT
			-- (from WEL_COLOR_CONSTANTS)

	Color_inactiveborder: INTEGER_32 = 11
			-- Inactive window border.
			--
			-- Declared in Windows as COLOR_INACTIVEBORDER
			-- (from WEL_COLOR_CONSTANTS)

	Color_inactivecaption: INTEGER_32 = 3
			-- Inactive window caption. 
			--
			-- Windows 98/Me, Windows 2000 or later:
			--   Specifies the left side color in the color gradient of an inactive
			--   window's title bar if the gradient effect is enabled.
			--
			-- Declared in Windows as COLOR_INACTIVECAPTION
			-- (from WEL_COLOR_CONSTANTS)

	Color_inactivecaptiontext: INTEGER_32 = 19
			-- Color of text in an inactive caption.
			--
			-- Declared in Windows as COLOR_INACTIVECAPTIONTEXT
			-- (from WEL_COLOR_CONSTANTS)

	Color_infobk: INTEGER_32 = 24
			-- Background color for tooltip controls.
			--
			-- Declared in Windows as COLOR_INFOBK
			-- (from WEL_COLOR_CONSTANTS)

	Color_infotext: INTEGER_32 = 23
			-- Text color for tooltip controls.
			--
			-- Declared in Windows as COLOR_INFOTEXT
			-- (from WEL_COLOR_CONSTANTS)

	Color_menu: INTEGER_32 = 4
			-- Menu background.
			--
			-- Declared in Windows as COLOR_MENU
			-- (from WEL_COLOR_CONSTANTS)

	Color_menubar: INTEGER_32 = 30
			-- Windows XP:
			--   The background color for the menu bar when menus appear as 
			--   flat menus (see SystemParametersInfo). However, `color_menu`
			--   continues to specify the background color of the menu popup.
			--
			-- Declared in Windows as COLOR_MENUBAR
			-- (from WEL_COLOR_CONSTANTS)

	Color_menuhilight: INTEGER_32 = 29
			-- Windows XP:
			--   The color used to highlight menu items when the menu appears
			--   as a flat menu (see SystemParametersInfo). The highlighted
			--   menu item is outlined with COLOR_HIGHLIGHT.
			--
			-- Declared in Windows as COLOR_MENUHILIGHT
			-- (from WEL_COLOR_CONSTANTS)

	Color_menutext: INTEGER_32 = 7
			-- Text in menus.
			--
			-- Declared in Windows as COLOR_MENUTEXT
			-- (from WEL_COLOR_CONSTANTS)

	Color_resolution: INTEGER_32 = 108
			-- Color resolution of the device in bits
			-- (from WEL_CAPABILITIES_CONSTANTS)

	Color_scrollbar: INTEGER_32 = 0
			-- Scroll bar gray area.
			--
			-- Declared in Windows as COLOR_SCROLLBAR
			-- (from WEL_COLOR_CONSTANTS)

	Color_table_start: STRING_32 = "{\colortbl ;"
			-- RTF string denoting start of color table.
			-- (from EV_RICH_TEXT_CONSTANTS_I)

	Color_window: INTEGER_32 = 5
			-- Window background.
			--
			-- Declared in Windows as COLOR_WINDOW
			-- (from WEL_COLOR_CONSTANTS)

	Color_windowframe: INTEGER_32 = 6
			-- Window frame.
			--
			-- Declared in Windows as COLOR_WINDOWFRAME
			-- (from WEL_COLOR_CONSTANTS)

	Color_windowtext: INTEGER_32 = 8
			-- Text in windows.
			--
			-- Declared in Windows as COLOR_WINDOWTEXT
			-- (from WEL_COLOR_CONSTANTS)

	commands: detachable WEL_COMMAND_MANAGER
			-- Command manager associated to the current window.
			-- (from WEL_WINDOW)

	configurable_target_menu_handler: detachable PROCEDURE [EV_MENU, ARRAYED_LIST [EV_PND_TARGET_DATA], EV_PICK_AND_DROPABLE, detachable ANY]
			-- (from EV_PICK_AND_DROPABLE_I)

	Cursor_on_widget: CELL [detachable EV_WIDGET_IMP]
			-- This cell contains the widget_imp that currently
			-- has the pointer of the mouse. As it is a once
			-- feature, it is a shared data.
			-- it is used for the mouse_enter and mouse_leave
			-- events.
			-- (from EV_WIDGET_IMP)
		require -- from  EV_PICK_AND_DROPABLE_IMP
			True
		ensure then -- from EV_WIDGET_IMP
			result_exists: Result /= Void

	Curve_caps: INTEGER_32 = 28
			-- See class WEL_CURVE_CAPABILITIES_CONSTANTS
			-- (from WEL_CAPABILITIES_CONSTANTS)

	Default_font: STRING_32 = "\cf1\highlight2\f0\fs"
			-- (from EV_RICH_TEXT_CONSTANTS_I)

	default_key_processing_handler: detachable PREDICATE [EV_KEY]
			-- Agent used to determine whether the default key processing should occur for Current.
			-- If agent returns True then default key processing continues as normal, False prevents
			-- default key processing from occurring.
			-- (from EV_WIDGET_I)

	Default_parent: EV_INTERNAL_SILLY_WINDOW_IMP
			-- A default parent for creation of Current.
			-- (from EV_WIDGET_IMP)
		ensure -- from EV_WIDGET_IMP
			valid_parent: Result /= Void

	default_processing: BOOLEAN
			-- (from WEL_RETURN_VALUE)

	deny_cursor: detachable EV_POINTER_STYLE
			-- Deny cursor set by user.
			-- To be displayed when the screen pointer is not over a valid target.
			-- (from EV_PICK_AND_DROPABLE_I)

	Drag_and_drop_starting_movement: INTEGER_32 = 3
			-- Pointer movement in pixels required to start a drag and drop.
			-- (from EV_SHARED_TRANSPORT_IMP)

	Driver_version: INTEGER_32 = 1
			-- Version number of the device driver
			-- (from WEL_CAPABILITIES_CONSTANTS)

	Dt_bottom: INTEGER_32 = 8
			-- Declared in Windows as DT_BOTTOM
			-- (from WEL_DT_CONSTANTS)

	Dt_calcrect: INTEGER_32 = 1024
			-- Declared in Windows as DT_CALCRECT
			-- (from WEL_DT_CONSTANTS)

	Dt_center: INTEGER_32 = 1
			-- Declared in Windows as DT_CENTER
			-- (from WEL_DT_CONSTANTS)

	Dt_expandtabs: INTEGER_32 = 64
			-- Declared in Windows as DT_EXPANDTABS
			-- (from WEL_DT_CONSTANTS)

	Dt_externalleading: INTEGER_32 = 512
			-- Declared in Windows as DT_EXTERNALLEADING
			-- (from WEL_DT_CONSTANTS)

	Dt_hideprefix: INTEGER_32 = 1048576
			-- Declared in Windows as DT_HIDEPREFIX
			-- (from WEL_DT_CONSTANTS)

	Dt_internal: INTEGER_32 = 4096
			-- Declared in Windows as DT_INTERNAL
			-- (from WEL_DT_CONSTANTS)

	Dt_left: INTEGER_32 = 0
			-- Declared in Windows as DT_LEFT
			-- (from WEL_DT_CONSTANTS)

	Dt_noclip: INTEGER_32 = 256
			-- Declared in Windows as DT_NOCLIP
			-- (from WEL_DT_CONSTANTS)

	Dt_noprefix: INTEGER_32 = 2048
			-- Declared in Windows as DT_NOPREFIX
			-- (from WEL_DT_CONSTANTS)

	Dt_right: INTEGER_32 = 2
			-- Declared in Windows as DT_RIGHT
			-- (from WEL_DT_CONSTANTS)

	Dt_singleline: INTEGER_32 = 32
			-- Declared in Windows as DT_SINGLELINE
			-- (from WEL_DT_CONSTANTS)

	Dt_tabstop: INTEGER_32 = 128
			-- Declared in Windows as DT_TABSTOP
			-- (from WEL_DT_CONSTANTS)

	Dt_top: INTEGER_32 = 0
			-- Declared in Windows as DT_TOP
			-- (from WEL_DT_CONSTANTS)

	Dt_vcenter: INTEGER_32 = 4
			-- Declared in Windows as DT_VCENTER
			-- (from WEL_DT_CONSTANTS)

	Dt_word_ellipsis: INTEGER_32 = 262144
			-- Declared in Windows as DT_WORD_ELLIPSIS
			-- (from WEL_DT_CONSTANTS)

	Dt_wordbreak: INTEGER_32 = 16
			-- Declared in Windows as DT_WORDBREAK
			-- (from WEL_DT_CONSTANTS)

	Eco_autohscroll: INTEGER_32 = 128
			-- Same as ES_AUTOHSCROLL style.
			-- (from WEL_ECO_CONSTANTS)

	Eco_autovscroll: INTEGER_32 = 64
			-- Same as ES_AUTOVSCROLL style.
			-- (from WEL_ECO_CONSTANTS)

	Eco_autowordselection: INTEGER_32 = 1
			-- Automatic selection of word on doubleclick.
			-- (from WEL_ECO_CONSTANTS)

	Eco_nohidesel: INTEGER_32 = 256
			-- Same as ES_NOHIDESEL style.
			-- (from WEL_ECO_CONSTANTS)

	Eco_readonly: INTEGER_32 = 2048
			-- Same as ES_READONLY style.
			-- (from WEL_ECO_CONSTANTS)

	Eco_savesel: INTEGER_32 = 32768
			-- Same as ES_SAVESEL style.
			-- (from WEL_ECO_CONSTANTS)

	Eco_selectionbar: INTEGER_32 = 16777216
			-- Same as ES_SELECTIONBAR style.
			-- (from WEL_ECO_CONSTANTS)

	Eco_vertical: INTEGER_32 = 4194304
			-- Same as ES_VERTICAL style. Available in
			-- Asian-language versions only.
			-- (from WEL_ECO_CONSTANTS)

	Eco_wantreturn: INTEGER_32 = 4096
			-- Same as ES_WANTRETURN style.
			-- (from WEL_ECO_CONSTANTS)

	Ecoop_and: INTEGER_32 = 3
			-- Retain only those current options that are also
			-- specified by fOptions.
			-- (from WEL_ECO_CONSTANTS)

	Ecoop_or: INTEGER_32 = 2
			-- Combine the specified options with the current
			-- options.
			-- (from WEL_ECO_CONSTANTS)

	Ecoop_set: INTEGER_32 = 1
			-- Set the options to those specified by fOptions.
			-- (from WEL_ECO_CONSTANTS)

	Ecoop_xor: INTEGER_32 = 4
			-- Retain only those current options that are not
			-- specified by fOptions.
			-- (from WEL_ECO_CONSTANTS)

	Em_canpaste: INTEGER_32 = 1074
			-- Declared in Windows as EM_CANPASTE
			-- (from WEL_RICH_EDIT_MESSAGE_CONSTANTS)

	Em_canundo: INTEGER_32 = 198
			-- (from WEL_EM_CONSTANTS)

	Em_charfrompos: INTEGER_32 = 215
			-- Declared in Windows as EM_CHARFROMPOS
			-- (from WEL_RICH_EDIT_MESSAGE_CONSTANTS)

	Em_displayband: INTEGER_32 = 1075
			-- Declared in Windows as EM_DISPLAYBAND
			-- (from WEL_RICH_EDIT_MESSAGE_CONSTANTS)

	Em_emptyundobuffer: INTEGER_32 = 205
			-- (from WEL_EM_CONSTANTS)

	Em_exgetsel: INTEGER_32 = 1076
			-- Declared in Windows as EM_EXGETSEL
			-- (from WEL_RICH_EDIT_MESSAGE_CONSTANTS)

	Em_exlimittext: INTEGER_32 = 1077
			-- Declared in Windows as EM_EXLIMITTEXT
			-- (from WEL_RICH_EDIT_MESSAGE_CONSTANTS)

	Em_exlinefromchar: INTEGER_32 = 1078
			-- Declared in Windows as EM_EXLINEFROMCHAR
			-- (from WEL_RICH_EDIT_MESSAGE_CONSTANTS)

	Em_exsetsel: INTEGER_32 = 1079
			-- Declared in Windows as EM_EXSETSEL
			-- (from WEL_RICH_EDIT_MESSAGE_CONSTANTS)

	Em_findtext: INTEGER_32 = 1080
			-- Declared in Windows as EM_FINDTEXT
			-- (from WEL_RICH_EDIT_MESSAGE_CONSTANTS)

	Em_findtextex: INTEGER_32 = 1103
			-- Declared in Windows as EM_FINDTEXTEX
			-- (from WEL_RICH_EDIT_MESSAGE_CONSTANTS)

	Em_findwordbreak: INTEGER_32 = 1100
			-- Declared in Windows as EM_FINDWORDBREAK
			-- (from WEL_RICH_EDIT_MESSAGE_CONSTANTS)

	Em_fmtlines: INTEGER_32 = 200
			-- (from WEL_EM_CONSTANTS)

	Em_formatrange: INTEGER_32 = 1081
			-- Declared in Windows as EM_FORMATRANGE
			-- (from WEL_RICH_EDIT_MESSAGE_CONSTANTS)

	Em_getcharformat: INTEGER_32 = 1082
			-- Declared in Windows as EM_GETCHARFORMAT
			-- (from WEL_RICH_EDIT_MESSAGE_CONSTANTS)

	Em_geteventmask: INTEGER_32 = 1083
			-- Declared in Windows as EM_GETEVENTMASK
			-- (from WEL_RICH_EDIT_MESSAGE_CONSTANTS)

	Em_getfirstvisibleline: INTEGER_32 = 206
			-- (from WEL_EM_CONSTANTS)

	Em_gethandle: INTEGER_32 = 189
			-- (from WEL_EM_CONSTANTS)

	Em_getimecolor: INTEGER_32 = 1129
			-- Declared in Windows as EM_GETIMECOLOR
			-- (from WEL_RICH_EDIT_MESSAGE_CONSTANTS)

	Em_getimeoptions: INTEGER_32 = 1131
			-- Declared in Windows as EM_GETIMEOPTIONS
			-- (from WEL_RICH_EDIT_MESSAGE_CONSTANTS)

	Em_getlimittext: INTEGER_32 = 213
			-- (from WEL_EM_CONSTANTS)

	Em_getline: INTEGER_32 = 196
			-- (from WEL_EM_CONSTANTS)

	Em_getlinecount: INTEGER_32 = 186
			-- (from WEL_EM_CONSTANTS)

	Em_getmodify: INTEGER_32 = 184
			-- (from WEL_EM_CONSTANTS)

	Em_getoptions: INTEGER_32 = 1102
			-- Declared in Windows as EM_GETOPTIONS
			-- (from WEL_RICH_EDIT_MESSAGE_CONSTANTS)

	Em_getparaformat: INTEGER_32 = 1085
			-- Declared in Windows as EM_GETPARAFORMAT
			-- (from WEL_RICH_EDIT_MESSAGE_CONSTANTS)

	Em_getpasswordchar: INTEGER_32 = 210
			-- (from WEL_EM_CONSTANTS)

	Em_getpunctuation: INTEGER_32 = 1125
			-- Declared in Windows as EM_GETPUNCTUATION
			-- (from WEL_RICH_EDIT_MESSAGE_CONSTANTS)

	Em_getrect: INTEGER_32 = 178
			-- (from WEL_EM_CONSTANTS)

	Em_getsel: INTEGER_32 = 176
			-- (from WEL_EM_CONSTANTS)

	Em_getseltext: INTEGER_32 = 1086
			-- Declared in Windows as EM_GETSELTEXT
			-- (from WEL_RICH_EDIT_MESSAGE_CONSTANTS)

	Em_gettextrange: INTEGER_32 = 1099
			-- Declared in Windows as EM_GETTEXTRANGE
			-- (from WEL_RICH_EDIT_MESSAGE_CONSTANTS)

	Em_getthumb: INTEGER_32 = 190
			-- (from WEL_EM_CONSTANTS)

	Em_gettypographyoptions: INTEGER_32 = 1227
			-- (from WEL_EM_CONSTANTS)

	Em_getwordbreakproc: INTEGER_32 = 209
			-- (from WEL_EM_CONSTANTS)

	Em_getwordbreakprocex: INTEGER_32 = 1104
			-- Declared in Windows as EM_GETWORDBREAKPROCEX
			-- (from WEL_RICH_EDIT_MESSAGE_CONSTANTS)

	Em_getwordwrapmode: INTEGER_32 = 1127
			-- Declared in Windows as EM_GETWORDWRAPMODE
			-- (from WEL_RICH_EDIT_MESSAGE_CONSTANTS)

	Em_hideselection: INTEGER_32 = 1087
			-- Declared in Windows as EM_HIDESELECTION
			-- (from WEL_RICH_EDIT_MESSAGE_CONSTANTS)

	Em_limittext: INTEGER_32 = 197
			-- (from WEL_EM_CONSTANTS)

	Em_linefromchar: INTEGER_32 = 201
			-- (from WEL_EM_CONSTANTS)

	Em_lineindex: INTEGER_32 = 187
			-- (from WEL_EM_CONSTANTS)

	Em_linelength: INTEGER_32 = 193
			-- (from WEL_EM_CONSTANTS)

	Em_linescroll: INTEGER_32 = 182
			-- (from WEL_EM_CONSTANTS)

	Em_pastespecial: INTEGER_32 = 1088
			-- Declared in Windows as EM_PASTESPECIAL
			-- (from WEL_RICH_EDIT_MESSAGE_CONSTANTS)

	Em_posfromchar: INTEGER_32 = 214
			-- Declared in Windows as EM_POSFROMCHAR
			-- (from WEL_RICH_EDIT_MESSAGE_CONSTANTS)

	Em_replacesel: INTEGER_32 = 194
			-- (from WEL_EM_CONSTANTS)

	Em_requestresize: INTEGER_32 = 1089
			-- Declared in Windows as EM_REQUESTRESIZE
			-- (from WEL_RICH_EDIT_MESSAGE_CONSTANTS)

	Em_scroll: INTEGER_32 = 181
			-- (from WEL_EM_CONSTANTS)

	Em_scrollcaret: INTEGER_32 = 183
			-- (from WEL_EM_CONSTANTS)

	Em_selectiontype: INTEGER_32 = 1090
			-- Declared in Windows as EM_SELECTIONTYPE
			-- (from WEL_RICH_EDIT_MESSAGE_CONSTANTS)

	Em_setbkgndcolor: INTEGER_32 = 1091
			-- Declared in Windows as EM_SETBKGNDCOLOR
			-- (from WEL_RICH_EDIT_MESSAGE_CONSTANTS)

	Em_setcharformat: INTEGER_32 = 1092
			-- Declared in Windows as EM_SETCHARFORMAT
			-- (from WEL_RICH_EDIT_MESSAGE_CONSTANTS)

	Em_seteventmask: INTEGER_32 = 1093
			-- Declared in Windows as EM_SETEVENTMASK
			-- (from WEL_RICH_EDIT_MESSAGE_CONSTANTS)

	Em_sethandle: INTEGER_32 = 188
			-- (from WEL_EM_CONSTANTS)

	Em_setimecolor: INTEGER_32 = 1128
			-- Declared in Windows as EM_SETIMECOLOR
			-- (from WEL_RICH_EDIT_MESSAGE_CONSTANTS)

	Em_setimeoptions: INTEGER_32 = 1130
			-- Declared in Windows as EM_SETIMEOPTIONS
			-- (from WEL_RICH_EDIT_MESSAGE_CONSTANTS)

	Em_setlimittext: INTEGER_32 = 197
			-- Declared in Windows as EM_SETLIMITTEXT
			-- (from WEL_RICH_EDIT_MESSAGE_CONSTANTS)

	Em_setmodify: INTEGER_32 = 185
			-- (from WEL_EM_CONSTANTS)

	Em_setoptions: INTEGER_32 = 1101
			-- Declared in Windows as EM_SETOPTIONS
			-- (from WEL_RICH_EDIT_MESSAGE_CONSTANTS)

	Em_setparaformat: INTEGER_32 = 1095
			-- Declared in Windows as EM_SETPARAFORMAT
			-- (from WEL_RICH_EDIT_MESSAGE_CONSTANTS)

	Em_setpasswordchar: INTEGER_32 = 204
			-- (from WEL_EM_CONSTANTS)

	Em_setpunctuation: INTEGER_32 = 1124
			-- Declared in Windows as EM_SETPUNCTUATION
			-- (from WEL_RICH_EDIT_MESSAGE_CONSTANTS)

	Em_setreadonly: INTEGER_32 = 207
			-- (from WEL_EM_CONSTANTS)

	Em_setrect: INTEGER_32 = 179
			-- (from WEL_EM_CONSTANTS)

	Em_setrectnp: INTEGER_32 = 180
			-- (from WEL_EM_CONSTANTS)

	Em_setsel: INTEGER_32 = 177
			-- (from WEL_EM_CONSTANTS)

	Em_settabstops: INTEGER_32 = 203
			-- (from WEL_EM_CONSTANTS)

	Em_settargetdevice: INTEGER_32 = 1096
			-- Declared in Windows as EM_SETTARGETDEVICE
			-- (from WEL_RICH_EDIT_MESSAGE_CONSTANTS)

	Em_settypographyoptions: INTEGER_32 = 1226
			-- (from WEL_EM_CONSTANTS)

	Em_setwordbreakproc: INTEGER_32 = 208
			-- (from WEL_EM_CONSTANTS)

	Em_setwordbreakprocex: INTEGER_32 = 1105
			-- Declared in Windows as EM_SETWORDBREAKPROCEX
			-- (from WEL_RICH_EDIT_MESSAGE_CONSTANTS)

	Em_setwordwrapmode: INTEGER_32 = 1126
			-- Declared in Windows as EM_SETWORDWRAPMODE
			-- (from WEL_RICH_EDIT_MESSAGE_CONSTANTS)

	Em_streamin: INTEGER_32 = 1097
			-- Declared in Windows as EM_STREAMIN
			-- (from WEL_RICH_EDIT_MESSAGE_CONSTANTS)

	Em_streamout: INTEGER_32 = 1098
			-- Declared in Windows as EM_STREAMOUT
			-- (from WEL_RICH_EDIT_MESSAGE_CONSTANTS)

	Em_undo: INTEGER_32 = 199
			-- (from WEL_EM_CONSTANTS)

	En_change: INTEGER_32 = 768
			-- (from WEL_EN_CONSTANTS)

	En_errspace: INTEGER_32 = 1280
			-- (from WEL_EN_CONSTANTS)

	En_hscroll: INTEGER_32 = 1537
			-- (from WEL_EN_CONSTANTS)

	En_killfocus: INTEGER_32 = 512
			-- (from WEL_EN_CONSTANTS)

	En_maxtext: INTEGER_32 = 1281
			-- (from WEL_EN_CONSTANTS)

	En_msgfilter: INTEGER_32 = 1792
			-- (from WEL_EN_CONSTANTS)

	En_requestresize: INTEGER_32 = 1793
			-- (from WEL_EN_CONSTANTS)

	En_selchange: INTEGER_32 = 1794
			-- Declared in Windows as EN_SELCHANGE
			-- (from WEL_RICH_EDIT_MESSAGE_CONSTANTS)

	En_setfocus: INTEGER_32 = 256
			-- (from WEL_EN_CONSTANTS)

	En_update: INTEGER_32 = 1024
			-- (from WEL_EN_CONSTANTS)

	En_vscroll: INTEGER_32 = 1538
			-- (from WEL_EN_CONSTANTS)

	Enm_change: INTEGER_32 = 1
			-- (from WEL_ENM_CONSTANTS)

	Enm_correcttext: INTEGER_32 = 4194304
			-- (from WEL_ENM_CONSTANTS)

	Enm_dropfiles: INTEGER_32 = 1048576
			-- (from WEL_ENM_CONSTANTS)

	Enm_imechange: INTEGER_32 = 8388608
			-- (from WEL_ENM_CONSTANTS)

	Enm_keyevents: INTEGER_32 = 65536
			-- (from WEL_ENM_CONSTANTS)

	Enm_mouseevents: INTEGER_32 = 131072
			-- (from WEL_ENM_CONSTANTS)

	Enm_none: INTEGER_32 = 0
			-- (from WEL_ENM_CONSTANTS)

	Enm_protected: INTEGER_32 = 2097152
			-- (from WEL_ENM_CONSTANTS)

	Enm_requestresize: INTEGER_32 = 262144
			-- (from WEL_ENM_CONSTANTS)

	Enm_scroll: INTEGER_32 = 4
			-- (from WEL_ENM_CONSTANTS)

	Enm_selchange: INTEGER_32 = 524288
			-- (from WEL_ENM_CONSTANTS)

	Enm_update: INTEGER_32 = 2
			-- (from WEL_ENM_CONSTANTS)

	Es_autohscroll: INTEGER_32 = 128
			-- (from WEL_ES_CONSTANTS)

	Es_autovscroll: INTEGER_32 = 64
			-- (from WEL_ES_CONSTANTS)

	Es_center: INTEGER_32 = 1
			-- (from WEL_ES_CONSTANTS)

	Es_disablenoscroll: INTEGER_32 = 8192
			-- Disables scrollbars instead of hiding them when they
			-- are not needed.
			-- (from WEL_RICH_EDIT_STYLE_CONSTANTS)

	Es_ex_nocalloleinit: INTEGER_32 = 16777216
			-- Prevents the control from calling the OleInitialize function
			-- when created. This window style is useful only in dialog 
			-- templates because CreateWindowEx does not accept this style.
			--
			-- Declared in Windows as ES_EX_NOCALLOLEINIT
			-- (from WEL_RICH_EDIT_STYLE_CONSTANTS)

	Es_left: INTEGER_32 = 0
			-- (from WEL_ES_CONSTANTS)

	Es_lowercase: INTEGER_32 = 16
			-- (from WEL_ES_CONSTANTS)

	Es_multiline: INTEGER_32 = 4
			-- (from WEL_ES_CONSTANTS)

	Es_nohidesel: INTEGER_32 = 256
			-- (from WEL_ES_CONSTANTS)

	Es_noime: INTEGER_32 = 524288
			-- Disables the input method editor (IME) operation.
			-- Available for Asian-languages only.
			-- (from WEL_RICH_EDIT_STYLE_CONSTANTS)

	Es_oemconvert: INTEGER_32 = 1024
			-- (from WEL_ES_CONSTANTS)

	Es_password: INTEGER_32 = 32
			-- (from WEL_ES_CONSTANTS)

	Es_readonly: INTEGER_32 = 2048
			-- (from WEL_ES_CONSTANTS)

	Es_right: INTEGER_32 = 2
			-- (from WEL_ES_CONSTANTS)

	Es_savesel: INTEGER_32 = 32768
			-- Preserves the selection when the control loses the
			-- focus. By default, the entire contents of the
			-- control are selected when it regains the focus.
			-- (from WEL_RICH_EDIT_STYLE_CONSTANTS)

	Es_selfime: INTEGER_32 = 262144
			-- Directs the rich edit control to allow the
			-- application to handle all IME operations.
			-- Available for Asian-languages only.
			-- (from WEL_RICH_EDIT_STYLE_CONSTANTS)

	Es_sunken: INTEGER_32 = 16384
			-- Displays the control with a sunken border style so
			-- that the rich edit control appears recessed into
			-- its parent window. Applications developed for
			-- Windows 95 should use WS_EX_CLIENTEDGE instead of
			-- ES_SUNKEN.
			-- (from WEL_RICH_EDIT_STYLE_CONSTANTS)

	Es_uppercase: INTEGER_32 = 8
			-- (from WEL_ES_CONSTANTS)

	Es_vertical: INTEGER_32 = 4194304
			-- Draws text and objects in a vertical direction.
			-- Available for Asian-languages only.
			-- (from WEL_RICH_EDIT_STYLE_CONSTANTS)

	Es_wantreturn: INTEGER_32 = 4096
			-- (from WEL_ES_CONSTANTS)

	ev_set_minimum_height (value: INTEGER_32; a_is_size_forced: BOOLEAN)
			-- Make value the new `minimum_height` of Current.
			-- Should check if the user didn't set the minimum width
			-- before setting a new value.
			-- (from EV_SIZEABLE_PRIMITIVE_IMP)
		require -- from EV_SIZEABLE_IMP
			not_is_destroyed: not is_destroyed

	ev_set_minimum_size (mw, mh: INTEGER_32; a_is_size_forced: BOOLEAN)
			-- Make mw the new minimum_width and mh the new
			-- minimum_height of Current.
			-- Should check if the user didn't set the minimum width
			-- before setting a new value.
			-- (from EV_SIZEABLE_PRIMITIVE_IMP)
		require -- from EV_SIZEABLE_IMP
			not_is_destroyed: not is_destroyed

	ev_set_minimum_width (value: INTEGER_32; a_is_size_forced: BOOLEAN)
			-- Make value the new `minimum_width` of Current.
			-- Should check if the user didn't set the minimum width
			-- before setting a new value.
			-- (from EV_SIZEABLE_PRIMITIVE_IMP)
		require -- from EV_SIZEABLE_IMP
			not_is_destroyed: not is_destroyed

	first_visible_line: INTEGER_32
			-- First visible line current being displayed.
			-- (from EV_TEXT_IMP)
		require -- from  EV_TEXT_I
			True
		ensure -- from EV_TEXT_I
			valid_line_index: valid_line_index (Result)

	Focus_on_widget: CELL [detachable EV_WIDGET_IMP]
			-- Widget that has currently the focus.
			-- (from EV_WIDGET_IMP)

	font: EV_FONT
			-- Font of Current.
			-- (from EV_FONTABLE_IMP)
		require -- from  EV_FONTABLE_I
			True
		ensure -- from EV_FONTABLE_I
			not_void: Result /= Void

	wel_font: WEL_FONT
			-- Font with which the control is drawing its text.
			-- (from WEL_CONTROL)
		require -- from  EV_FONTABLE_IMP
			True
		require -- from  EV_TEXT_COMPONENT_IMP
			True
		require -- from WEL_CONTROL
			exists: exists
		ensure -- from WEL_CONTROL
			result_not_void: Result /= Void

	Font_table_start: STRING_32 = "{\rtf1\ansi\ansicpg1252\uc1\deff0\deflang1033{\fonttbl"
			-- RTF string denoting start of font table.
			-- (from EV_RICH_TEXT_CONSTANTS_I)

	frozen foreground_color: EV_COLOR
			-- Color of foreground features like text.
			-- (from EV_COLORIZABLE_I)

	foreground_color_internal: detachable EV_COLOR
			-- Color used for the foreground of Current.
			-- (from EV_WIDGET_IMP)
		require -- from  EV_COLORIZABLE_I
			True

	Fr_matchcase: INTEGER_32 = 4
			-- Case sensitive search
			-- (from WEL_FIND_FLAGS_CONSTANTS)

	Fr_wholeword: INTEGER_32 = 2
			-- Whole word search
			-- (from WEL_FIND_FLAGS_CONSTANTS)

	generating_type: TYPE [detachable EV_RICH_TEXT_IMP]
			-- Type of current object
			-- (type of which it is a direct instance)
			-- (from ANY)
		ensure -- from ANY
			generating_type_not_void: Result /= Void

	generator: STRING_8
			-- Name of current object's generating class
			-- (base class of the type of which it is a direct instance)
			-- (from ANY)
		ensure -- from ANY
			generator_not_void: Result /= Void
			generator_not_empty: not Result.is_empty

	Gwl_exstyle: INTEGER_32 = -20
			-- (from WEL_GWL_CONSTANTS)

	Gwl_style: INTEGER_32 = -16
			-- (from WEL_GWL_CONSTANTS)

	has_return_value: BOOLEAN
			-- Should the window procedure return a value?
			-- (from WEL_RETURN_VALUE)

	has_word_wrapping: BOOLEAN
			-- Is word wrapping enabled?
			-- If enabled, lines that are too long to be displayed
			-- in Current will be wrapped onto new lines.
			-- If disabled, a horizontal scroll bar will be displayed
			-- and lines will not be wrapped.
			-- (from EV_TEXT_IMP)
		require -- from  EV_TEXT_I
			True

	height: INTEGER_32
			-- Height of Current.
			-- (from EV_WIDGET_IMP)
		require -- from  EV_POSITIONED_I
			True
		require -- from EV_SIZEABLE_IMP
			not_is_destroyed: not is_destroyed

	help_context: detachable FUNCTION [EV_HELP_CONTEXT]
			-- Agent that evaluates to help context sent to help engine when help is requested
			-- (from EV_HELP_CONTEXTABLE_I)
		ensure -- from EV_HELP_CONTEXTABLE_I
			current_if_exists: internal_help_context /= Void implies Result = internal_help_context

	Himetric_per_inch: INTEGER_32 = 2540
			-- Defined as HIMETRIC_PER_INCH in AtlWin.h
			-- (from WEL_UNIT_CONVERSION)

	Horizontal_resolution: INTEGER_32 = 8
			-- Width of the display, in pixels
			-- (from WEL_CAPABILITIES_CONSTANTS)

	Horizontal_size: INTEGER_32 = 4
			-- Width of the physical display in millimeters
			-- (from WEL_CAPABILITIES_CONSTANTS)

	frozen hwnd_bottom: POINTER
			-- (from WEL_HWND_CONSTANTS)

	frozen hwnd_broadcast: POINTER
			-- (from WEL_HWND_CONSTANTS)

	frozen hwnd_message: POINTER
			-- (from WEL_HWND_CONSTANTS)

	frozen hwnd_notopmost: POINTER
			-- (from WEL_HWND_CONSTANTS)

	frozen hwnd_top: POINTER
			-- (from WEL_HWND_CONSTANTS)

	frozen hwnd_topmost: POINTER
			-- (from WEL_HWND_CONSTANTS)

	id: INTEGER_32
			-- Control id
			-- (from WEL_CONTROL)

	Idabort: INTEGER_32 = 3
			-- Abort button was selected.
			-- (from WEL_ID_CONSTANTS)

	Idcancel: INTEGER_32 = 2
			-- Cancel button was selected.
			-- (from WEL_ID_CONSTANTS)

	Idignore: INTEGER_32 = 5
			-- Ignore button was selected.
			-- (from WEL_ID_CONSTANTS)

	Idno: INTEGER_32 = 7
			-- No button was selected.
			-- (from WEL_ID_CONSTANTS)

	Idok: INTEGER_32 = 1
			-- OK button was selected.
			-- (from WEL_ID_CONSTANTS)

	Idretry: INTEGER_32 = 4
			-- Retry button was selected.
			-- (from WEL_ID_CONSTANTS)

	Idyes: INTEGER_32 = 6
			-- Yes button was selected.
			-- (from WEL_ID_CONSTANTS)

	insert_text (txt: READABLE_STRING_GENERAL)
			-- Insert txt at `caret_position`.
			-- (from EV_TEXT_IMP)
		require -- from EV_TEXT_COMPONENT_I
			valid_text: txt /= Void
		require -- from WEL_RICH_EDIT
			exists: exists
			a_text_not_void: txt /= Void

	internal_font: EV_FONT
			-- Font of Current for internal queries.
			-- Faster than calling `font` as we do not need to
			-- create a new EV_FONT every time.
			-- (from EV_FONTABLE_IMP)

	internal_font_height: INTEGER_32
			-- Height required to correctly display font of Current in pixels.
			-- (from EV_FONTABLE_IMP)
		require -- from  EV_TEXT_COMPONENT_IMP
			True
		ensure -- from EV_FONTABLE_IMP
			result_non_negative: Result >= 0

	internal_pointer_style: EV_POINTER_STYLE
			-- Cursor displayed when screen pointer is over current widget,
			-- as seen from interface.
			-- (from EV_WIDGET_I)

	is_dock_executing: BOOLEAN
			-- Is Current in the process of a dockable transport?
			-- (from EV_DOCKABLE_SOURCE_I)

	is_dockable: BOOLEAN
			-- Is Current dockable?
			-- (from EV_DOCKABLE_SOURCE_I)

	is_external_docking_enabled: BOOLEAN
			-- Is Current able to be docked into an EV_DOCKABLE_DIALOG
			-- When there is no valid EV_DRAGABLE_TARGET upon completion
			-- of the transport?
			-- (from EV_DOCKABLE_SOURCE_I)

	is_external_docking_relative: BOOLEAN
			-- Will dockable dialog displayed when Current is docked externally
			-- be displayed relative to parent window of Current?
			-- Otherwise displayed as a standard window.
			-- (from EV_DOCKABLE_SOURCE_I)

	wel_item: POINTER
			-- Generic Windows handle or structure pointer.
			-- Can be a HWND, HICON, RECT *, WNDCLASS *, etc...
			-- (from WEL_ANY)

	key_code_from_key_string (key_string: READABLE_STRING_GENERAL): INTEGER_32
			-- Key code value from key_string
			-- (from EV_KEY_CONSTANTS)
		require -- from EV_KEY_CONSTANTS
			key_string_not_void: key_string /= Void

	Key_strings: ARRAY [STRING_32]
			-- String representations of all key codes.
			-- (from EV_KEY_CONSTANTS)

	line (i: INTEGER_32): STRING_32
			-- Result is content of the ith line.
			-- (from EV_TEXT_IMP)
		require -- from EV_TEXT_I
			valid_line: valid_line_index (i)
		ensure -- from EV_TEXT_I
			result_not_void: Result /= Void

	Line_caps: INTEGER_32 = 30
			-- See class WEL_LINE_CAPABILITIES_CONSTANTS
			-- (from WEL_CAPABILITIES_CONSTANTS)

	line_count: INTEGER_32
			-- Number of lines of text in Current.
			-- (from EV_TEXT_IMP)
		ensure -- from EV_TEXT_I
			result_greater_zero: Result > 0

	Logical_pixels_x: INTEGER_32 = 88
			-- Number of pixels per logical inch along
			-- the display width
			-- (from WEL_CAPABILITIES_CONSTANTS)

	Logical_pixels_y: INTEGER_32 = 90
			-- Number of pixels per logical inch along
			-- the display height
			-- (from WEL_CAPABILITIES_CONSTANTS)

	Maximum_buffered_string_size: INTEGER_32 = 10000
			-- Maximum size of string permitting a shared WEL_STRING object to
			-- be returned by `wel_string_restricted`.
			-- (from WEL_SHARED_TEMPORARY_OBJECTS)

	Mb_abortretryignore: INTEGER_32 = 2
			-- (from WEL_MB_CONSTANTS)

	Mb_applmodal: INTEGER_32 = 0
			-- (from WEL_MB_CONSTANTS)

	Mb_default_desktop_only: INTEGER_32 = 131072
			-- (from WEL_MB_CONSTANTS)

	Mb_defbutton1: INTEGER_32 = 0
			-- (from WEL_MB_CONSTANTS)

	Mb_defbutton2: INTEGER_32 = 256
			-- (from WEL_MB_CONSTANTS)

	Mb_defbutton3: INTEGER_32 = 512
			-- (from WEL_MB_CONSTANTS)

	Mb_defmask: INTEGER_32 = 3840
			-- (from WEL_MB_CONSTANTS)

	Mb_help: INTEGER_32 = 16384
			-- (from WEL_MB_CONSTANTS)

	Mb_iconasterisk: INTEGER_32 = 64
			-- (from WEL_MB_CONSTANTS)

	Mb_iconerror: INTEGER_32 = 16
			-- Same as `mb_iconhand`.
			-- (from WEL_MB_CONSTANTS)

	Mb_iconexclamation: INTEGER_32 = 48
			-- (from WEL_MB_CONSTANTS)

	Mb_iconhand: INTEGER_32 = 16
			-- (from WEL_MB_CONSTANTS)

	Mb_iconinformation: INTEGER_32 = 64
			-- Same as `mb_iconasterisk`.
			-- (from WEL_MB_CONSTANTS)

	Mb_iconmask: INTEGER_32 = 240
			-- (from WEL_MB_CONSTANTS)

	Mb_iconquestion: INTEGER_32 = 32
			-- (from WEL_MB_CONSTANTS)

	Mb_iconstop: INTEGER_32 = 16
			-- Same as `mb_iconhand`.
			-- (from WEL_MB_CONSTANTS)

	Mb_iconwarning: INTEGER_32 = 48
			-- Same as `mb_iconexclamation`.
			-- (from WEL_MB_CONSTANTS)

	Mb_nofocus: INTEGER_32 = 32768
			-- (from WEL_MB_CONSTANTS)

	Mb_ok: INTEGER_32 = 0
			-- (from WEL_MB_CONSTANTS)

	Mb_okcancel: INTEGER_32 = 1
			-- (from WEL_MB_CONSTANTS)

	Mb_retrycancel: INTEGER_32 = 5
			-- (from WEL_MB_CONSTANTS)

	Mb_right: INTEGER_32 = 524288
			-- (from WEL_MB_CONSTANTS)

	Mb_rtlreading: INTEGER_32 = 1048576
			-- (from WEL_MB_CONSTANTS)

	Mb_setforeground: INTEGER_32 = 65536
			-- (from WEL_MB_CONSTANTS)

	Mb_systemmodal: INTEGER_32 = 4096
			-- (from WEL_MB_CONSTANTS)

	Mb_taskmodal: INTEGER_32 = 8192
			-- (from WEL_MB_CONSTANTS)

	Mb_topmost: INTEGER_32 = 262144
			-- (from WEL_MB_CONSTANTS)

	Mb_typemask: INTEGER_32 = 15
			-- (from WEL_MB_CONSTANTS)

	Mb_usericon: INTEGER_32 = 128
			-- (from WEL_MB_CONSTANTS)

	Mb_yesno: INTEGER_32 = 4
			-- (from WEL_MB_CONSTANTS)

	Mb_yesnocancel: INTEGER_32 = 3
			-- (from WEL_MB_CONSTANTS)

	message_return_value: POINTER
			-- Return value of the window procedure.
			-- (from WEL_RETURN_VALUE)
		require -- from WEL_RETURN_VALUE
			has_return_value: has_return_value

	minimum_height: INTEGER_32
			-- Lower bound on `height` in pixels.
			-- (from EV_SIZEABLE_IMP)
		require -- from  EV_POSITIONED_I
			True

	minimum_width: INTEGER_32
			-- Lower bound on `width` in pixels.
			-- (from EV_SIZEABLE_IMP)
		require -- from  EV_POSITIONED_I
			True

	not_external_docking_enabled: BOOLEAN
			-- Attribute used for is_externally_dockable. We must implement
			-- is_externally_dockable this way as we have no easy solution to
			-- assign True to is_externally_dockable.
			-- (from EV_DOCKABLE_SOURCE_I)

	not_is_external_docking_relative: BOOLEAN
			-- Will dockable dialog displayed when Current is docked externally
			-- be displayed relative to parent window of Current?
			-- Otherwise displayed as a standard window.
			-- Internal reversed value of `is_external_docking_relative` as we cannot
			-- easily initialize a BOOLE to True in this case.
			-- (from EV_DOCKABLE_SOURCE_I)

	Num_brushes: INTEGER_32 = 16
			-- Number of device-specific brushes
			-- (from WEL_CAPABILITIES_CONSTANTS)

	Num_colors: INTEGER_32 = 24
			-- Number of entries in the device's color table
			-- (from WEL_CAPABILITIES_CONSTANTS)

	Num_fonts: INTEGER_32 = 22
			-- Number of device-specific fonts
			-- (from WEL_CAPABILITIES_CONSTANTS)

	Num_markers: INTEGER_32 = 20
			-- Number of device-specific markers
			-- (from WEL_CAPABILITIES_CONSTANTS)

	Num_pens: INTEGER_32 = 18
			-- Number of device-specific pens
			-- (from WEL_CAPABILITIES_CONSTANTS)

	Num_reserved: INTEGER_32 = 106
			-- Number of reserved entries in the system palette
			-- (from WEL_CAPABILITIES_CONSTANTS)

	original_parent_position: INTEGER_32
			-- Original position in parent. Required
			-- to restore widget later.
			-- (from EV_DOCKABLE_SOURCE_I)

	original_pressure: REAL_64
			-- Hold the values passed to start transport so when a transport
			-- actually starts, with real_start_transport,these can be passed
			-- as arguments.
			-- (from EV_SHARED_TRANSPORT_IMP)

	original_x: INTEGER_32
			-- (from EV_SHARED_TRANSPORT_IMP)

	original_x_tilt: REAL_64
			-- Hold the values passed to start transport so when a transport
			-- actually starts, with real_start_transport,these can be passed
			-- as arguments.
			-- (from EV_SHARED_TRANSPORT_IMP)

	original_y: INTEGER_32
			-- (from EV_SHARED_TRANSPORT_IMP)

	original_y_tilt: REAL_64
			-- Hold the values passed to start transport so when a transport
			-- actually starts, with real_start_transport,these can be passed
			-- as arguments.
			-- (from EV_SHARED_TRANSPORT_IMP)

	parent: detachable EV_CONTAINER
			-- Parent of Current
			-- (from EV_WIDGET_IMP)
		require -- from  EV_WIDGET_I
			True

	wel_parent: detachable WEL_WINDOW
			-- Parent window
			-- (from WEL_WINDOW)

	Pdevice_size: INTEGER_32 = 26
			-- Size of the PDEVICE internal structure, in bytes
			-- (from WEL_CAPABILITIES_CONSTANTS)

	pebble: detachable ANY
			-- Data to be transported by pick and drop mechanism.
			-- (from EV_PICK_AND_DROPABLE_I)

	pebble_function: detachable FUNCTION [detachable ANY]
			-- Returns data to be transported by pick and drop mechanism.
			-- (from EV_PICK_AND_DROPABLE_I)

	pebble_positioning_enabled: BOOLEAN
			-- If True then pick and drop start coordinates are
			-- `pebble_x_position`, `pebble_y_position`.
			-- If False then pick and drop start coordinates are
			-- the pointer coordinates.
			-- (from EV_PICK_AND_DROPABLE_I)

	pebble_x_position: INTEGER_32
			-- Initial x position for pick and drop relative to Current.
			-- (from EV_PICK_AND_DROPABLE_I)

	pebble_y_position: INTEGER_32
			-- Initial y position for pick and drop relative to Current.
			-- (from EV_PICK_AND_DROPABLE_I)

	Pfa_center: INTEGER_32 = 3
			-- Paragraphs are centered.
			-- (from WEL_PFA_CONSTANTS)

	Pfa_full_interword: INTEGER_32 = 5
			-- Paragraphs are justified by expanding blanks alone.
			-- (from WEL_PFA_CONSTANTS)

	Pfa_justify: INTEGER_32 = 4
			-- Paragraphs are justified.
			-- (from WEL_PFA_CONSTANTS)

	Pfa_left: INTEGER_32 = 1
			-- Paragraphs are aligned with the left margin.
			-- (from WEL_PFA_CONSTANTS)

	Pfa_right: INTEGER_32 = 2
			-- Paragraphs are aligned with the right margin.
			-- (from WEL_PFA_CONSTANTS)

	Pfm_alignment: INTEGER_32 = 8
			-- The wAlignment member is valid.
			-- (from WEL_PFM_CONSTANTS)

	Pfm_border: INTEGER_32 = 2048
			-- The wBorderSpace, wBorderWidth and wBorders members are valid.
			-- (from WEL_PFM_CONSTANTS)

	Pfm_linespacing: INTEGER_32 = 256
			-- The dyLineSpacing member is valid.
			-- (from WEL_PFM_CONSTANTS)

	Pfm_numbering: INTEGER_32 = 32
			-- The wNumbering member is valid.
			-- (from WEL_PFM_CONSTANTS)

	Pfm_numberingstart: INTEGER_32 = 32768
			-- The wNumberingStart member is valid.
			-- (from WEL_PFM_CONSTANTS)

	Pfm_numberingstyle: INTEGER_32 = 8092
			-- The wNumberingStyle member is valid.
			-- (from WEL_PFM_CONSTANTS)

	Pfm_numberingtab: INTEGER_32 = 16384
			-- The wNumberingTab member is valid.
			-- (from WEL_PFM_CONSTANTS)

	Pfm_offset: INTEGER_32 = 4
			-- The dxStartIndent member is valid and specifies
			-- a relative value.
			-- (from WEL_PFM_CONSTANTS)

	Pfm_offsetindent: INTEGER_32 = -2147483648
			-- The dxOffset member is valid.
			-- (from WEL_PFM_CONSTANTS)

	Pfm_rightindent: INTEGER_32 = 2
			-- The dxRightIndent member is valid.
			-- (from WEL_PFM_CONSTANTS)

	Pfm_shading: INTEGER_32 = 4096
			-- The wShadingStyle and wShadingWeight members arevalid.
			-- (from WEL_PFM_CONSTANTS)

	Pfm_spaceafter: INTEGER_32 = 128
			-- The dySpaceAfter member is valid.
			-- (from WEL_PFM_CONSTANTS)

	Pfm_spacebefore: INTEGER_32 = 64
			-- The dySpaceBefore member is valid.
			-- (from WEL_PFM_CONSTANTS)

	Pfm_startindent: INTEGER_32 = 1
			-- The dxStartIndent member is valid.
			-- (from WEL_PFM_CONSTANTS)

	Pfm_style: INTEGER_32 = 512
			-- The sStyle member is valid.
			-- (from WEL_PFM_CONSTANTS)

	Pfm_tabstops: INTEGER_32 = 16
			-- The cTabStobs and rgxTabStops members are valid.
			-- (from WEL_PFM_CONSTANTS)

	Physical_offset_x: INTEGER_32 = 112
			-- Distance from left edge of the printable area, in
			-- device units.
			-- (from WEL_CAPABILITIES_CONSTANTS)

	Physical_offset_y: INTEGER_32 = 113
			-- Distance from top edge of the printable area, in
			-- device units.
			-- (from WEL_CAPABILITIES_CONSTANTS)

	Planes: INTEGER_32 = 14
			-- Number of color planes
			-- (from WEL_CAPABILITIES_CONSTANTS)

	pointer_position: EV_COORDINATE
			-- Position of the screen pointer relative to Current.
			-- (from EV_WIDGET_IMP)
		require -- from  EV_WIDGET_I
			True
		ensure -- from EV_WIDGET_I
			result_not_void: Result /= Void

	pointer_style: detachable EV_POINTER_STYLE
			-- Pointer displayed when the pointing device is over Current.
			-- (from EV_WIDGET_IMP)
		require -- from  EV_WIDGET_I
			True
		require -- from  EV_DOCKABLE_SOURCE_IMP
			True

	Polygonal_caps: INTEGER_32 = 32
			-- See class WEL_POLYGONAL_CAPABILITIES_CONSTANTS
			-- (from WEL_CAPABILITIES_CONSTANTS)

	Raster_caps: INTEGER_32 = 38
			-- See class WEL_RASTER_CAPABILITIES_CONSTANTS
			-- (from WEL_CAPABILITIES_CONSTANTS)

	real_source: detachable EV_DOCKABLE_SOURCE
			-- Result is EV_DOCKABLE_SOURCE which should be
			-- dragged when docking begins on Current.
			-- (from EV_DOCKABLE_SOURCE_I)

	real_target: detachable EV_DOCKABLE_TARGET
			-- Result is target used during a dockable transport if
			-- mouse pointer is above Current.
			-- (from EV_WIDGET_I)

	Rtf_backslash: STRING_32 = "\\"
			-- String denoting RTF backslash.
			-- (from EV_RICH_TEXT_CONSTANTS_I)

	Rtf_blue: STRING_32 = "blue"
			-- String denoting blue component of a RTF color.
			-- (from EV_RICH_TEXT_CONSTANTS_I)

	Rtf_bold_string: STRING_32 = "b"
			-- String denoting bold in RTF.
			-- (from EV_RICH_TEXT_CONSTANTS_I)

	Rtf_charset: STRING_32 = "fcharset"
			-- (from EV_RICH_TEXT_CONSTANTS_I)

	Rtf_close_brace: STRING_32 = "\}"
			-- String denoting RTF close brace.
			-- (from EV_RICH_TEXT_CONSTANTS_I)

	Rtf_close_brace_character: CHARACTER_8 = '}'
			-- (from EV_RICH_TEXT_CONSTANTS_I)

	Rtf_color_string: STRING_32 = "cf"
			-- String denoting color in RTF.
			-- (from EV_RICH_TEXT_CONSTANTS_I)

	Rtf_colortbl: STRING_32 = "colortbl"
			-- (from EV_RICH_TEXT_CONSTANTS_I)

	Rtf_control_character: CHARACTER_8 = '\'
			-- (from EV_RICH_TEXT_CONSTANTS_I)

	Rtf_family_modern: STRING_32 = "fmodern"
			-- (from EV_RICH_TEXT_CONSTANTS_I)

	Rtf_family_modern_int: INTEGER_32 = 5
			-- (from EV_RICH_TEXT_CONSTANTS_I)

	Rtf_family_nill: STRING_32 = "fnill"
			-- (from EV_RICH_TEXT_CONSTANTS_I)

	Rtf_family_nill_int: INTEGER_32 = 6
			-- (from EV_RICH_TEXT_CONSTANTS_I)

	Rtf_family_roman: STRING_32 = "froman"
			-- (from EV_RICH_TEXT_CONSTANTS_I)

	Rtf_family_roman_int: INTEGER_32 = 2
			-- (from EV_RICH_TEXT_CONSTANTS_I)

	Rtf_family_script: STRING_32 = "fscript"
			-- (from EV_RICH_TEXT_CONSTANTS_I)

	Rtf_family_script_int: INTEGER_32 = 4
			-- (from EV_RICH_TEXT_CONSTANTS_I)

	Rtf_family_swiss: STRING_32 = "fswiss"
			-- (from EV_RICH_TEXT_CONSTANTS_I)

	Rtf_family_swiss_int: INTEGER_32 = 3
			-- (from EV_RICH_TEXT_CONSTANTS_I)

	Rtf_family_tech: STRING_32 = "ftech"
			-- (from EV_RICH_TEXT_CONSTANTS_I)

	Rtf_family_tech_int: INTEGER_32 = 1
			-- (from EV_RICH_TEXT_CONSTANTS_I)

	Rtf_font_charset: STRING_32 = "fcharset"
			-- (from EV_RICH_TEXT_CONSTANTS_I)

	Rtf_font_size_string: STRING_32 = "fs"
			-- String denoting font size in RTF.
			-- (from EV_RICH_TEXT_CONSTANTS_I)

	Rtf_font_string: STRING_32 = "f"
			-- String denoting font index in RTF.
			-- (from EV_RICH_TEXT_CONSTANTS_I)

	Rtf_fonttable: STRING_32 = "fonttbl"
			-- (from EV_RICH_TEXT_CONSTANTS_I)

	Rtf_green: STRING_32 = "green"
			-- String denoting green component of a RTF color.
			-- (from EV_RICH_TEXT_CONSTANTS_I)

	Rtf_highlight_string: STRING_32 = "highlight"
			-- String denoting highlighting color in RFT.
			-- (from EV_RICH_TEXT_CONSTANTS_I)

	Rtf_info: STRING_32 = "info"
			-- (from EV_RICH_TEXT_CONSTANTS_I)

	Rtf_italic_string: STRING_32 = "i"
			-- String denoting italic in RTF.
			-- (from EV_RICH_TEXT_CONSTANTS_I)

	Rtf_new_paragraph: STRING_32 = "pard"
			-- String denoting start of standard paragraph.
			-- (from EV_RICH_TEXT_CONSTANTS_I)

	Rtf_newline: STRING_32 = "par"
			-- String denoting RTF newline.
			-- (from EV_RICH_TEXT_CONSTANTS_I)

	Rtf_open_brace: STRING_32 = "\{"
			-- String denoting RTF open brace.
			-- (from EV_RICH_TEXT_CONSTANTS_I)

	Rtf_open_brace_character: CHARACTER_8 = '{'
			-- (from EV_RICH_TEXT_CONSTANTS_I)

	Rtf_paragraph_center_aligned: STRING_32 = "qc"
			-- String denoting start of center aligned paragraph.
			-- (from EV_RICH_TEXT_CONSTANTS_I)

	Rtf_paragraph_justified: STRING_32 = "qj"
			-- String denoting start of justified paragraph.
			-- (from EV_RICH_TEXT_CONSTANTS_I)

	Rtf_paragraph_left_aligned: STRING_32 = "ql"
			-- String denoting start of left aligned paragraph.
			-- (from EV_RICH_TEXT_CONSTANTS_I)

	Rtf_paragraph_left_indent: STRING_32 = "li"
			-- String denoting left indent of paragraph.
			-- (from EV_RICH_TEXT_CONSTANTS_I)

	Rtf_paragraph_right_aligned: STRING_32 = "qr"
			-- String denoting start of right aligned paragraph.
			-- (from EV_RICH_TEXT_CONSTANTS_I)

	Rtf_paragraph_right_indent: STRING_32 = "ri"
			-- String denoting right indent of paragraph.
			-- (from EV_RICH_TEXT_CONSTANTS_I)

	Rtf_paragraph_space_after: STRING_32 = "sa"
			-- String denoting space after paragraph.
			-- (from EV_RICH_TEXT_CONSTANTS_I)

	Rtf_paragraph_space_before: STRING_32 = "sb"
			-- String denoting space before paragraph.
			-- (from EV_RICH_TEXT_CONSTANTS_I)

	Rtf_red: STRING_32 = "red"
			-- String denoting red component of a RTF color.
			-- (from EV_RICH_TEXT_CONSTANTS_I)

	Rtf_strikeout_string: STRING_32 = "strike"
			-- String denoting striked out in RTF.
			-- (from EV_RICH_TEXT_CONSTANTS_I)

	Rtf_stylesheet: STRING_32 = "stylesheet"
			-- (from EV_RICH_TEXT_CONSTANTS_I)

	Rtf_underline_none_string: STRING_32 = "ulnone"
			-- String denoting end of underlined in RTF.
			-- (from EV_RICH_TEXT_CONSTANTS_I)

	Rtf_underline_string: STRING_32 = "ul"
			-- String denoting underlined in RTF.
			-- (from EV_RICH_TEXT_CONSTANTS_I)

	Rtf_unicode_character: STRING_32 = "\u"
			-- String denoting starting of a Unicode character.
			-- (from EV_RICH_TEXT_CONSTANTS_I)

	Rtf_unicode_string: STRING_32 = "u"
			-- String denoting underlined in RTF.
			-- (from EV_RICH_TEXT_CONSTANTS_I)

	Rtf_user_props: STRING_32 = "*"
			-- (from EV_RICH_TEXT_CONSTANTS_I)

	Rtf_vertical_offset: STRING_32 = "up"
			-- String denoting start of vertical offset in RTF.
			-- (from EV_RICH_TEXT_CONSTANTS_I)

	Sb_both: INTEGER_32 = 3
			-- Declared in Windows as SB_BOTH
			-- (from WEL_SB_CONSTANTS)

	Sb_bottom: INTEGER_32 = 7
			-- Declared in Windows as SB_BOTTOM
			-- (from WEL_SB_CONSTANTS)

	Sb_ctl: INTEGER_32 = 2
			-- Declared in Windows as SB_CTL
			-- (from WEL_SB_CONSTANTS)

	Sb_endscroll: INTEGER_32 = 8
			-- Declared in Windows as SB_ENDSCROLL
			-- (from WEL_SB_CONSTANTS)

	Sb_horz: INTEGER_32 = 0
			-- Declared in Windows as SB_HORZ
			-- (from WEL_SB_CONSTANTS)

	Sb_left: INTEGER_32 = 6
			-- Declared in Windows as SB_LEFT
			-- (from WEL_SB_CONSTANTS)

	Sb_linedown: INTEGER_32 = 1
			-- Declared in Windows as SB_LINEDOWN
			-- (from WEL_SB_CONSTANTS)

	Sb_lineleft: INTEGER_32 = 0
			-- Declared in Windows as SB_LINELEFT
			-- (from WEL_SB_CONSTANTS)

	Sb_lineright: INTEGER_32 = 1
			-- Declared in Windows as SB_LINERIGHT
			-- (from WEL_SB_CONSTANTS)

	Sb_lineup: INTEGER_32 = 0
			-- Declared in Windows as SB_LINEUP
			-- (from WEL_SB_CONSTANTS)

	Sb_pagedown: INTEGER_32 = 3
			-- Declared in Windows as SB_PAGEDOWN
			-- (from WEL_SB_CONSTANTS)

	Sb_pageleft: INTEGER_32 = 2
			-- Declared in Windows as SB_PAGELEFT
			-- (from WEL_SB_CONSTANTS)

	Sb_pageright: INTEGER_32 = 3
			-- Declared in Windows as SB_PAGERIGHT
			-- (from WEL_SB_CONSTANTS)

	Sb_pageup: INTEGER_32 = 2
			-- Declared in Windows as SB_PAGEUP
			-- (from WEL_SB_CONSTANTS)

	Sb_right: INTEGER_32 = 7
			-- Declared in Windows as SB_RIGHT
			-- (from WEL_SB_CONSTANTS)

	Sb_thumbposition: INTEGER_32 = 4
			-- Declared in Windows as SB_THUMBPOSITION
			-- (from WEL_SB_CONSTANTS)

	Sb_thumbtrack: INTEGER_32 = 5
			-- Declared in Windows as SB_THUMBTRACK
			-- (from WEL_SB_CONSTANTS)

	Sb_top: INTEGER_32 = 6
			-- Declared in Windows as SB_TOP
			-- (from WEL_SB_CONSTANTS)

	Sb_vert: INTEGER_32 = 1
			-- Declared in Windows as SB_VERT
			-- (from WEL_SB_CONSTANTS)

	Scaling_factor_x: INTEGER_32 = 114
			-- Scaling factor for the x-axis of the printer.
			-- (from WEL_CAPABILITIES_CONSTANTS)

	Scaling_factor_y: INTEGER_32 = 115
			-- Scaling factor for the y-axis of the printer.
			-- (from WEL_CAPABILITIES_CONSTANTS)

	Scf_all: INTEGER_32 = 4
			-- Apply format to all text.
			-- (from WEL_SCF_CONSTANTS)

	Scf_selection: INTEGER_32 = 1
			-- Apply format to selection only.
			-- (from WEL_SCF_CONSTANTS)

	Scf_word: INTEGER_32 = 2
			-- Apply format to word only.
			-- (from WEL_SCF_CONSTANTS)

	screen_x: INTEGER_32
			-- Horizontal offset of Current relative to screen
			-- (from EV_WIDGET_IMP)
		require -- from  EV_POSITIONED_I
			True

	screen_y: INTEGER_32
			-- Vertical offset of Current relative to screen.
			-- (from EV_WIDGET_IMP)
		require -- from  EV_POSITIONED_I
			True

	Sf_rtf: INTEGER_32 = 2
			-- Rich-text format (RTF).
			-- (from WEL_SF_CONSTANTS)

	Sf_rtfnoobjs: INTEGER_32 = 3
			-- RTF with spaces in place of OLE object.
			-- (from WEL_SF_CONSTANTS)

	Sf_text: INTEGER_32 = 1
			-- Text with spaces in place of OLE objects.
			-- (from WEL_SF_CONSTANTS)

	Sf_textized: INTEGER_32 = 4
			-- Text with a text representation of OLE objects.
			-- (from WEL_SF_CONSTANTS)

	Sf_unicode: INTEGER_32 = 16
			-- Unicode file of some kind, version 2.0+ only.
			-- (from WEL_SF_CONSTANTS)

	Sff_selection: INTEGER_32 = 32768
			-- Selection only.
			-- (from WEL_SF_CONSTANTS)

	silly_window: WEL_SILLY_WINDOW
			-- Window that receives some private messages for WEL to work properly.
			-- (from WEL_RESIZING_SUPPORT)

	Size_palette: INTEGER_32 = 104
			-- Number of entries in the system palette
			-- (from WEL_CAPABILITIES_CONSTANTS)

	Sm_cmetrics: INTEGER_32 = 76
			-- (from WEL_SM_CONSTANTS)

	Sm_cmonitors: INTEGER_32 = 80
			-- (from WEL_SM_CONSTANTS)

	Sm_cxborder: INTEGER_32 = 5
			-- (from WEL_SM_CONSTANTS)

	Sm_cxcursor: INTEGER_32 = 13
			-- (from WEL_SM_CONSTANTS)

	Sm_cxdlgframe: INTEGER_32 = 7
			-- (from WEL_SM_CONSTANTS)

	Sm_cxdoubleclk: INTEGER_32 = 36
			-- (from WEL_SM_CONSTANTS)

	Sm_cxframe: INTEGER_32 = 32
			-- (from WEL_SM_CONSTANTS)

	Sm_cxfullscreen: INTEGER_32 = 16
			-- (from WEL_SM_CONSTANTS)

	Sm_cxhscroll: INTEGER_32 = 21
			-- (from WEL_SM_CONSTANTS)

	Sm_cxhthumb: INTEGER_32 = 10
			-- (from WEL_SM_CONSTANTS)

	Sm_cxicon: INTEGER_32 = 11
			-- (from WEL_SM_CONSTANTS)

	Sm_cxiconspacing: INTEGER_32 = 38
			-- (from WEL_SM_CONSTANTS)

	Sm_cxmaximized: INTEGER_32 = 61
			-- (from WEL_SM_CONSTANTS)

	Sm_cxmenucheck: INTEGER_32 = 71
			-- (from WEL_SM_CONSTANTS)

	Sm_cxmin: INTEGER_32 = 28
			-- (from WEL_SM_CONSTANTS)

	Sm_cxmintrack: INTEGER_32 = 34
			-- (from WEL_SM_CONSTANTS)

	Sm_cxscreen: INTEGER_32 = 0
			-- (from WEL_SM_CONSTANTS)

	Sm_cxsize: INTEGER_32 = 30
			-- (from WEL_SM_CONSTANTS)

	Sm_cxvirtualscreen: INTEGER_32 = 78
			-- (from WEL_SM_CONSTANTS)

	Sm_cxvscroll: INTEGER_32 = 2
			-- (from WEL_SM_CONSTANTS)

	Sm_cyborder: INTEGER_32 = 6
			-- (from WEL_SM_CONSTANTS)

	Sm_cycaption: INTEGER_32 = 4
			-- (from WEL_SM_CONSTANTS)

	Sm_cycursor: INTEGER_32 = 14
			-- (from WEL_SM_CONSTANTS)

	Sm_cydlgframe: INTEGER_32 = 8
			-- (from WEL_SM_CONSTANTS)

	Sm_cydoubleclk: INTEGER_32 = 37
			-- (from WEL_SM_CONSTANTS)

	Sm_cyframe: INTEGER_32 = 33
			-- (from WEL_SM_CONSTANTS)

	Sm_cyfullscreen: INTEGER_32 = 17
			-- (from WEL_SM_CONSTANTS)

	Sm_cyhscroll: INTEGER_32 = 3
			-- (from WEL_SM_CONSTANTS)

	Sm_cyicon: INTEGER_32 = 12
			-- (from WEL_SM_CONSTANTS)

	Sm_cyiconspacing: INTEGER_32 = 39
			-- (from WEL_SM_CONSTANTS)

	Sm_cykanjiwindow: INTEGER_32 = 18
			-- (from WEL_SM_CONSTANTS)

	Sm_cymaximized: INTEGER_32 = 62
			-- (from WEL_SM_CONSTANTS)

	Sm_cymenu: INTEGER_32 = 15
			-- (from WEL_SM_CONSTANTS)

	Sm_cymenucheck: INTEGER_32 = 72
			-- (from WEL_SM_CONSTANTS)

	Sm_cymin: INTEGER_32 = 29
			-- (from WEL_SM_CONSTANTS)

	Sm_cymintrack: INTEGER_32 = 35
			-- (from WEL_SM_CONSTANTS)

	Sm_cyscreen: INTEGER_32 = 1
			-- (from WEL_SM_CONSTANTS)

	Sm_cysize: INTEGER_32 = 31
			-- (from WEL_SM_CONSTANTS)

	Sm_cyvirtualscreen: INTEGER_32 = 79
			-- (from WEL_SM_CONSTANTS)

	Sm_cyvscroll: INTEGER_32 = 20
			-- (from WEL_SM_CONSTANTS)

	Sm_cyvthumb: INTEGER_32 = 9
			-- (from WEL_SM_CONSTANTS)

	Sm_dbcsenabled: INTEGER_32 = 42
			-- (from WEL_SM_CONSTANTS)

	Sm_debug: INTEGER_32 = 22
			-- (from WEL_SM_CONSTANTS)

	Sm_immenabled: INTEGER_32 = 82
			-- (from WEL_SM_CONSTANTS)

	Sm_menudropalignment: INTEGER_32 = 40
			-- (from WEL_SM_CONSTANTS)

	Sm_mousepresent: INTEGER_32 = 19
			-- (from WEL_SM_CONSTANTS)

	Sm_mousewheelpresent: INTEGER_32 = 75
			-- (from WEL_SM_CONSTANTS)

	Sm_penwindows: INTEGER_32 = 41
			-- (from WEL_SM_CONSTANTS)

	Sm_remotesession: INTEGER_32 = 4096
			-- (from WEL_SM_CONSTANTS)

	Sm_reserved1: INTEGER_32 = 24
			-- (from WEL_SM_CONSTANTS)

	Sm_reserved2: INTEGER_32 = 25
			-- (from WEL_SM_CONSTANTS)

	Sm_reserved3: INTEGER_32 = 26
			-- (from WEL_SM_CONSTANTS)

	Sm_reserved4: INTEGER_32 = 27
			-- (from WEL_SM_CONSTANTS)

	Sm_swapbutton: INTEGER_32 = 23
			-- (from WEL_SM_CONSTANTS)

	Sm_xvirtualscreen: INTEGER_32 = 76
			-- (from WEL_SM_CONSTANTS)

	Sm_yvirtualscreen: INTEGER_32 = 77
			-- (from WEL_SM_CONSTANTS)

	Space_string: STRING_32 = " "
			-- String denoting empty space.
			-- (from EV_RICH_TEXT_CONSTANTS_I)

	Ss_bitmap: INTEGER_32 = 14
			-- (from WEL_SS_CONSTANTS)

	Ss_blackframe: INTEGER_32 = 7
			-- (from WEL_SS_CONSTANTS)

	Ss_blackrect: INTEGER_32 = 4
			-- (from WEL_SS_CONSTANTS)

	Ss_center: INTEGER_32 = 1
			-- (from WEL_SS_CONSTANTS)

	Ss_centerimage: INTEGER_32 = 512
			-- (from WEL_SS_CONSTANTS)

	Ss_grayframe: INTEGER_32 = 8
			-- (from WEL_SS_CONSTANTS)

	Ss_grayrect: INTEGER_32 = 5
			-- (from WEL_SS_CONSTANTS)

	Ss_icon: INTEGER_32 = 3
			-- (from WEL_SS_CONSTANTS)

	Ss_left: INTEGER_32 = 0
			-- (from WEL_SS_CONSTANTS)

	Ss_leftnowordwrap: INTEGER_32 = 12
			-- (from WEL_SS_CONSTANTS)

	Ss_noprefix: INTEGER_32 = 128
			-- (from WEL_SS_CONSTANTS)

	Ss_notify: INTEGER_32 = 256
			-- (from WEL_SS_CONSTANTS)

	Ss_ownerdraw: INTEGER_32 = 13
			-- (from WEL_SS_CONSTANTS)

	Ss_right: INTEGER_32 = 2
			-- (from WEL_SS_CONSTANTS)

	Ss_simple: INTEGER_32 = 11
			-- (from WEL_SS_CONSTANTS)

	Ss_useritem: INTEGER_32 = 10
			-- (from WEL_SS_CONSTANTS)

	Ss_whiteframe: INTEGER_32 = 9
			-- (from WEL_SS_CONSTANTS)

	Ss_whiterect: INTEGER_32 = 6
			-- (from WEL_SS_CONSTANTS)

	Sw_hide: INTEGER_32 = 0
			-- Declared in Windows as SW_HIDE
			-- (from WEL_SW_CONSTANTS)

	Sw_minimize: INTEGER_32 = 6
			-- Declared in Windows as SW_MINIMIZE
			-- (from WEL_SW_CONSTANTS)

	Sw_otherunzoom: INTEGER_32 = 4
			-- Declared in Windows as SW_OTHERUNZOOM
			-- (from WEL_SW_CONSTANTS)

	Sw_otherzoom: INTEGER_32 = 2
			-- Declared in Windows as SW_OTHERZOOM
			-- (from WEL_SW_CONSTANTS)

	Sw_parentclosing: INTEGER_32 = 1
			-- Declared in Windows as SW_PARENTCLOSING
			-- (from WEL_SW_CONSTANTS)

	Sw_parentopening: INTEGER_32 = 3
			-- Declared in Windows as SW_PARENTOPENING
			-- (from WEL_SW_CONSTANTS)

	Sw_restore: INTEGER_32 = 9
			-- Declared in Windows as SW_RESTORE
			-- (from WEL_SW_CONSTANTS)

	Sw_show: INTEGER_32 = 5
			-- Declared in Windows as SW_SHOW
			-- (from WEL_SW_CONSTANTS)

	Sw_showmaximized: INTEGER_32 = 3
			-- Declared in Windows as SW_SHOWMAXIMIZED
			-- (from WEL_SW_CONSTANTS)

	Sw_showminimized: INTEGER_32 = 2
			-- Declared in Windows as SW_SHOWMINIMIZED
			-- (from WEL_SW_CONSTANTS)

	Sw_showminnoactive: INTEGER_32 = 7
			-- Declared in Windows as SW_SHOWMINNOACTIVE
			-- (from WEL_SW_CONSTANTS)

	Sw_showna: INTEGER_32 = 8
			-- Declared in Windows as SW_SHOWNA
			-- (from WEL_SW_CONSTANTS)

	Sw_shownoactivate: INTEGER_32 = 4
			-- Declared in Windows as SW_SHOWNOACTIVATE
			-- (from WEL_SW_CONSTANTS)

	Sw_shownormal: INTEGER_32 = 1
			-- Declared in Windows as SW_SHOWNORMAL
			-- (from WEL_SW_CONSTANTS)

	Swp_asyncwindowpos: INTEGER_32 = 16384
			-- If the calling thread and the thread that owns the window are attached
			-- to different input queues, the system posts the request to the thread--
			-- that owns the window. This prevents the calling thread from blocking
			-- its execution while other threads process the request.
			-- (from WEL_SWP_CONSTANTS)

	Swp_defererase: INTEGER_32 = 8192
			-- Prevents generation of the WM_SYNCPAINT message.
			-- (from WEL_SWP_CONSTANTS)

	Swp_drawframe: INTEGER_32 = 32
			-- Same as `swp_framechanged`.
			-- (from WEL_SWP_CONSTANTS)

	Swp_framechanged: INTEGER_32 = 32
			-- Frame changed: send WM_NCCALCSIZE.
			-- (from WEL_SWP_CONSTANTS)

	Swp_hidewindow: INTEGER_32 = 128
			-- (from WEL_SWP_CONSTANTS)

	Swp_noactivate: INTEGER_32 = 16
			-- (from WEL_SWP_CONSTANTS)

	Swp_nocopybits: INTEGER_32 = 256
			-- (from WEL_SWP_CONSTANTS)

	Swp_nomove: INTEGER_32 = 2
			-- (from WEL_SWP_CONSTANTS)

	Swp_noownerzorder: INTEGER_32 = 512
			-- (from WEL_SWP_CONSTANTS)

	Swp_noredraw: INTEGER_32 = 8
			-- (from WEL_SWP_CONSTANTS)

	Swp_noreposition: INTEGER_32 = 512
			-- Same as Swp_noownerzborder.
			-- (from WEL_SWP_CONSTANTS)

	Swp_nosendchanging: INTEGER_32 = 1024
			-- Don't send WM_WINDOWPOSCHANGING.
			-- (from WEL_SWP_CONSTANTS)

	Swp_nosize: INTEGER_32 = 1
			-- (from WEL_SWP_CONSTANTS)

	Swp_nozorder: INTEGER_32 = 4
			-- (from WEL_SWP_CONSTANTS)

	Swp_showwindow: INTEGER_32 = 64
			-- (from WEL_SWP_CONSTANTS)

	Technology: INTEGER_32 = 2
			-- Device technology.
			-- See class WEL_DEVICE_TECHNOLOGY_CONSTANTS
			-- (from WEL_CAPABILITIES_CONSTANTS)

	Text_caps: INTEGER_32 = 34
			-- See class WEL_TEXT_CAPABILITIES_CONSTANTS
			-- (from WEL_CAPABILITIES_CONSTANTS)

	To_advancedtypography: INTEGER_32 = 1
			-- Advanced typography settings for use with `em_settypographyoptions` and
			-- `em_gettypographyoptions`.
			-- (from WEL_EM_CONSTANTS)

	To_simplelinebreak: INTEGER_32 = 2
			-- Simple line settings for use with `em_settypographyoptions` and
			-- `em_gettypographyoptions`.
			-- (from WEL_EM_CONSTANTS)

	top_level_window: detachable EV_WINDOW
			-- Top level window that contains Current.
			-- (from EV_WIDGET_IMP)

	top_level_window_imp: detachable EV_WINDOW_IMP
			-- Top level window that contains Current.
			-- (from EV_PRIMITIVE_IMP)

	transport_executing: BOOLEAN
			-- Is a pick and drop or drag and drop currently
			-- being executed?
			-- (from EV_PICK_AND_DROPABLE_IMP)

	Vertical_resolution: INTEGER_32 = 10
			-- Height of the display, in raster lines
			-- (from WEL_CAPABILITIES_CONSTANTS)

	Vertical_size: INTEGER_32 = 6
			-- Height of the physical display in millimeters
			-- (from WEL_CAPABILITIES_CONSTANTS)

	View_text: STRING_32 = "\viewkind4\uc1\pard"
			-- A STRING constant representing the view type of the RTF document.
			-- (from EV_RICH_TEXT_CONSTANTS_I)

	Vk_0: INTEGER_32 = 48
			-- (from WEL_VK_CONSTANTS)

	Vk_1: INTEGER_32 = 49
			-- (from WEL_VK_CONSTANTS)

	Vk_2: INTEGER_32 = 50
			-- (from WEL_VK_CONSTANTS)

	Vk_3: INTEGER_32 = 51
			-- (from WEL_VK_CONSTANTS)

	Vk_4: INTEGER_32 = 52
			-- (from WEL_VK_CONSTANTS)

	Vk_5: INTEGER_32 = 53
			-- (from WEL_VK_CONSTANTS)

	Vk_6: INTEGER_32 = 54
			-- (from WEL_VK_CONSTANTS)

	Vk_7: INTEGER_32 = 55
			-- (from WEL_VK_CONSTANTS)

	Vk_8: INTEGER_32 = 56
			-- (from WEL_VK_CONSTANTS)

	Vk_9: INTEGER_32 = 57
			-- Vk_a thru Vk_z are the same as their ASCII equivalents: 'A' thru 'Z'.
			-- (from WEL_VK_CONSTANTS)

	Vk_a: INTEGER_32 = 65
			-- (from WEL_VK_CONSTANTS)

	Vk_add: INTEGER_32 = 107
			-- Declared in Windows as VK_ADD
			-- (from WEL_VK_CONSTANTS)

	Vk_alt: INTEGER_32 = 18
			-- Declared in Windows as VK_MENU
			-- Was declared in {WEL_VK_CONSTANTS} as synonym of `vk_menu`.
			-- (from WEL_VK_CONSTANTS)

	Vk_apps: INTEGER_32 = 93
			-- Declared in Windows as VK_APPS
			-- Vk_0 thru Vk_9 are the same as their ASCII equivalents: '0' thru '9'.
			-- (from WEL_VK_CONSTANTS)

	Vk_b: INTEGER_32 = 66
			-- (from WEL_VK_CONSTANTS)

	Vk_back: INTEGER_32 = 8
			-- Declared in Windows as VK_BACK
			-- (from WEL_VK_CONSTANTS)

	Vk_c: INTEGER_32 = 67
			-- (from WEL_VK_CONSTANTS)

	Vk_cancel: INTEGER_32 = 3
			-- Declared in Windows as VK_CANCEL
			-- (from WEL_VK_CONSTANTS)

	Vk_capital: INTEGER_32 = 20
			-- Declared in Windows as VK_CAPITAL
			-- (from WEL_VK_CONSTANTS)

	Vk_clear: INTEGER_32 = 12
			-- Declared in Windows as VK_CLEAR
			-- (from WEL_VK_CONSTANTS)

	Vk_control: INTEGER_32 = 17
			-- Declared in Windows as VK_CONTROL
			-- (from WEL_VK_CONSTANTS)

	Vk_d: INTEGER_32 = 68
			-- (from WEL_VK_CONSTANTS)

	Vk_decimal: INTEGER_32 = 110
			-- Declared in Windows as VK_DECIMAL
			-- (from WEL_VK_CONSTANTS)

	Vk_delete: INTEGER_32 = 46
			-- Declared in Windows as VK_DELETE
			-- (from WEL_VK_CONSTANTS)

	Vk_divide: INTEGER_32 = 111
			-- Declared in Windows as VK_DIVIDE
			-- (from WEL_VK_CONSTANTS)

	Vk_down: INTEGER_32 = 40
			-- Declared in Windows as VK_DOWN
			-- (from WEL_VK_CONSTANTS)

	Vk_e: INTEGER_32 = 69
			-- (from WEL_VK_CONSTANTS)

	Vk_end: INTEGER_32 = 35
			-- Declared in Windows as VK_END
			-- (from WEL_VK_CONSTANTS)

	Vk_escape: INTEGER_32 = 27
			-- Declared in Windows as VK_ESCAPE
			-- (from WEL_VK_CONSTANTS)

	Vk_execute: INTEGER_32 = 43
			-- Declared in Windows as VK_EXECUTE
			-- (from WEL_VK_CONSTANTS)

	Vk_f: INTEGER_32 = 70
			-- (from WEL_VK_CONSTANTS)

	Vk_f1: INTEGER_32 = 112
			-- Declared in Windows as VK_F1
			-- (from WEL_VK_CONSTANTS)

	Vk_f10: INTEGER_32 = 121
			-- Declared in Windows as VK_F10
			-- (from WEL_VK_CONSTANTS)

	Vk_f11: INTEGER_32 = 122
			-- Declared in Windows as VK_F11
			-- (from WEL_VK_CONSTANTS)

	Vk_f12: INTEGER_32 = 123
			-- Declared in Windows as VK_F12
			-- (from WEL_VK_CONSTANTS)

	Vk_f13: INTEGER_32 = 124
			-- Declared in Windows as VK_F13
			-- (from WEL_VK_CONSTANTS)

	Vk_f14: INTEGER_32 = 125
			-- Declared in Windows as VK_F14
			-- (from WEL_VK_CONSTANTS)

	Vk_f15: INTEGER_32 = 126
			-- Declared in Windows as VK_F15
			-- (from WEL_VK_CONSTANTS)

	Vk_f16: INTEGER_32 = 127
			-- Declared in Windows as VK_F16
			-- (from WEL_VK_CONSTANTS)

	Vk_f17: INTEGER_32 = 128
			-- Declared in Windows as VK_F17
			-- (from WEL_VK_CONSTANTS)

	Vk_f18: INTEGER_32 = 129
			-- Declared in Windows as VK_F18
			-- (from WEL_VK_CONSTANTS)

	Vk_f19: INTEGER_32 = 130
			-- Declared in Windows as VK_F19
			-- (from WEL_VK_CONSTANTS)

	Vk_f2: INTEGER_32 = 113
			-- Declared in Windows as VK_F2
			-- (from WEL_VK_CONSTANTS)

	Vk_f20: INTEGER_32 = 131
			-- Declared in Windows as VK_F20
			-- (from WEL_VK_CONSTANTS)

	Vk_f21: INTEGER_32 = 132
			-- Declared in Windows as VK_F21
			-- (from WEL_VK_CONSTANTS)

	Vk_f22: INTEGER_32 = 133
			-- Declared in Windows as VK_F22
			-- (from WEL_VK_CONSTANTS)

	Vk_f23: INTEGER_32 = 134
			-- Declared in Windows as VK_F23
			-- (from WEL_VK_CONSTANTS)

	Vk_f24: INTEGER_32 = 135
			-- Declared in Windows as VK_F24
			-- (from WEL_VK_CONSTANTS)

	Vk_f3: INTEGER_32 = 114
			-- Declared in Windows as VK_F3
			-- (from WEL_VK_CONSTANTS)

	Vk_f4: INTEGER_32 = 115
			-- Declared in Windows as VK_F4
			-- (from WEL_VK_CONSTANTS)

	Vk_f5: INTEGER_32 = 116
			-- Declared in Windows as VK_F5
			-- (from WEL_VK_CONSTANTS)

	Vk_f6: INTEGER_32 = 117
			-- Declared in Windows as VK_F6
			-- (from WEL_VK_CONSTANTS)

	Vk_f7: INTEGER_32 = 118
			-- Declared in Windows as VK_F7
			-- (from WEL_VK_CONSTANTS)

	Vk_f8: INTEGER_32 = 119
			-- Declared in Windows as VK_F8
			-- (from WEL_VK_CONSTANTS)

	Vk_f9: INTEGER_32 = 120
			-- Declared in Windows as VK_F9
			-- (from WEL_VK_CONSTANTS)

	Vk_g: INTEGER_32 = 71
			-- (from WEL_VK_CONSTANTS)

	Vk_h: INTEGER_32 = 72
			-- (from WEL_VK_CONSTANTS)

	Vk_help: INTEGER_32 = 47
			-- Declared in Windows as VK_HELP
			-- (from WEL_VK_CONSTANTS)

	Vk_home: INTEGER_32 = 36
			-- Declared in Windows as VK_HOME
			-- (from WEL_VK_CONSTANTS)

	Vk_i: INTEGER_32 = 73
			-- (from WEL_VK_CONSTANTS)

	Vk_insert: INTEGER_32 = 45
			-- Declared in Windows as VK_INSERT
			-- (from WEL_VK_CONSTANTS)

	Vk_j: INTEGER_32 = 74
			-- (from WEL_VK_CONSTANTS)

	Vk_k: INTEGER_32 = 75
			-- (from WEL_VK_CONSTANTS)

	Vk_l: INTEGER_32 = 76
			-- (from WEL_VK_CONSTANTS)

	Vk_lbutton: INTEGER_32 = 1
			-- Declared in Windows as VK_LBUTTON
			-- (from WEL_VK_CONSTANTS)

	Vk_lcontrol: INTEGER_32 = 162
			-- Declared in Windows as VK_LCONTROL
			-- (from WEL_VK_CONSTANTS)

	Vk_left: INTEGER_32 = 37
			-- Declared in Windows as VK_LEFT
			-- (from WEL_VK_CONSTANTS)

	Vk_lmenu: INTEGER_32 = 164
			-- Declared in Windows as VK_LMENU
			-- (from WEL_VK_CONSTANTS)

	Vk_lshift: INTEGER_32 = 160
			-- Declared in Windows as VK_LSHIFT
			-- (from WEL_VK_CONSTANTS)

	Vk_m: INTEGER_32 = 77
			-- (from WEL_VK_CONSTANTS)

	Vk_mbutton: INTEGER_32 = 4
			-- Declared in Windows as VK_MBUTTON
			-- (from WEL_VK_CONSTANTS)

	Vk_menu: INTEGER_32 = 18
			-- Declared in Windows as VK_MENU
			-- Was declared in {WEL_VK_CONSTANTS} as synonym of `vk_alt`.
			-- (from WEL_VK_CONSTANTS)

	Vk_multiply: INTEGER_32 = 106
			-- Declared in Windows as VK_MULTIPLY
			-- (from WEL_VK_CONSTANTS)

	Vk_n: INTEGER_32 = 78
			-- (from WEL_VK_CONSTANTS)

	Vk_next: INTEGER_32 = 34
			-- Declared in Windows as VK_NEXT
			-- (from WEL_VK_CONSTANTS)

	Vk_numlock: INTEGER_32 = 144
			-- Declared in Windows as VK_NUMLOCK
			-- (from WEL_VK_CONSTANTS)

	Vk_numpad0: INTEGER_32 = 96
			-- Declared in Windows as VK_NUMPAD0
			-- (from WEL_VK_CONSTANTS)

	Vk_numpad1: INTEGER_32 = 97
			-- Declared in Windows as VK_NUMPAD1
			-- (from WEL_VK_CONSTANTS)

	Vk_numpad2: INTEGER_32 = 98
			-- Declared in Windows as VK_NUMPAD2
			-- (from WEL_VK_CONSTANTS)

	Vk_numpad3: INTEGER_32 = 99
			-- Declared in Windows as VK_NUMPAD3
			-- (from WEL_VK_CONSTANTS)

	Vk_numpad4: INTEGER_32 = 100
			-- Declared in Windows as VK_NUMPAD4
			-- (from WEL_VK_CONSTANTS)

	Vk_numpad5: INTEGER_32 = 101
			-- Declared in Windows as VK_NUMPAD5
			-- (from WEL_VK_CONSTANTS)

	Vk_numpad6: INTEGER_32 = 102
			-- Declared in Windows as VK_NUMPAD6
			-- (from WEL_VK_CONSTANTS)

	Vk_numpad7: INTEGER_32 = 103
			-- Declared in Windows as VK_NUMPAD7
			-- (from WEL_VK_CONSTANTS)

	Vk_numpad8: INTEGER_32 = 104
			-- Declared in Windows as VK_NUMPAD8
			-- (from WEL_VK_CONSTANTS)

	Vk_numpad9: INTEGER_32 = 105
			-- Declared in Windows as VK_NUMPAD9
			-- (from WEL_VK_CONSTANTS)

	Vk_o: INTEGER_32 = 79
			-- (from WEL_VK_CONSTANTS)

	Vk_p: INTEGER_32 = 80
			-- (from WEL_VK_CONSTANTS)

	Vk_pause: INTEGER_32 = 19
			-- Declared in Windows as VK_PAUSE
			-- (from WEL_VK_CONSTANTS)

	Vk_print: INTEGER_32 = 42
			-- Declared in Windows as VK_PRINT
			-- (from WEL_VK_CONSTANTS)

	Vk_prior: INTEGER_32 = 33
			-- Declared in Windows as VK_PRIOR
			-- (from WEL_VK_CONSTANTS)

	Vk_q: INTEGER_32 = 81
			-- (from WEL_VK_CONSTANTS)

	Vk_r: INTEGER_32 = 82
			-- (from WEL_VK_CONSTANTS)

	Vk_rbutton: INTEGER_32 = 2
			-- Declared in Windows as VK_RBUTTON
			-- (from WEL_VK_CONSTANTS)

	Vk_rcontrol: INTEGER_32 = 163
			-- Declared in Windows as VK_RCONTROL
			-- (from WEL_VK_CONSTANTS)

	Vk_return: INTEGER_32 = 13
			-- Declared in Windows as VK_RETURN
			-- (from WEL_VK_CONSTANTS)

	Vk_right: INTEGER_32 = 39
			-- Declared in Windows as VK_RIGHT
			-- (from WEL_VK_CONSTANTS)

	Vk_rmenu: INTEGER_32 = 165
			-- Declared in Windows as VK_RMENU
			-- (from WEL_VK_CONSTANTS)

	Vk_rshift: INTEGER_32 = 161
			-- Declared in Windows as VK_RSHIFT
			-- (from WEL_VK_CONSTANTS)

	Vk_s: INTEGER_32 = 83
			-- (from WEL_VK_CONSTANTS)

	Vk_scroll: INTEGER_32 = 145
			-- Declared in Windows as VK_SCROLL
			-- (from WEL_VK_CONSTANTS)

	Vk_select: INTEGER_32 = 41
			-- Declared in Windows as VK_SELECT
			-- (from WEL_VK_CONSTANTS)

	Vk_separator: INTEGER_32 = 108
			-- Declared in Windows as VK_SEPARATOR
			-- (from WEL_VK_CONSTANTS)

	Vk_shift: INTEGER_32 = 16
			-- Declared in Windows as VK_SHIFT
			-- (from WEL_VK_CONSTANTS)

	Vk_snapshot: INTEGER_32 = 44
			-- Declared in Windows as VK_SNAPSHOT
			-- (from WEL_VK_CONSTANTS)

	Vk_space: INTEGER_32 = 32
			-- Declared in Windows as VK_SPACE
			-- (from WEL_VK_CONSTANTS)

	Vk_subtract: INTEGER_32 = 109
			-- Declared in Windows as VK_SUBTRACT
			-- (from WEL_VK_CONSTANTS)

	Vk_t: INTEGER_32 = 84
			-- (from WEL_VK_CONSTANTS)

	Vk_tab: INTEGER_32 = 9
			-- Declared in Windows as VK_TAB
			-- (from WEL_VK_CONSTANTS)

	Vk_u: INTEGER_32 = 85
			-- (from WEL_VK_CONSTANTS)

	Vk_up: INTEGER_32 = 38
			-- Declared in Windows as VK_UP
			-- (from WEL_VK_CONSTANTS)

	Vk_v: INTEGER_32 = 86
			-- (from WEL_VK_CONSTANTS)

	Vk_w: INTEGER_32 = 87
			-- (from WEL_VK_CONSTANTS)

	Vk_x: INTEGER_32 = 88
			-- (from WEL_VK_CONSTANTS)

	Vk_y: INTEGER_32 = 89
			-- (from WEL_VK_CONSTANTS)

	Vk_z: INTEGER_32 = 90
			-- (from WEL_VK_CONSTANTS)

	Wa_active: INTEGER_32 = 1
			-- Window gains activation via alt-tab
			-- (from WEL_WA_CONSTANTS)

	Wa_clickactive: INTEGER_32 = 2
			-- Window gains activation via mouse click
			-- (from WEL_WA_CONSTANTS)

	Wa_inactivate: INTEGER_32 = 0
			-- Window loses activation
			-- (from WEL_WA_CONSTANTS)

	Wel_rect: WEL_RECT
			-- Once access to an object of type WEL_RECT
			-- (from WEL_SHARED_TEMPORARY_OBJECTS)

	Wel_string: WEL_STRING
			-- Once access to an object of type WEL_STRING
			-- (from WEL_SHARED_TEMPORARY_OBJECTS)

	wel_string_from_string (s: READABLE_STRING_GENERAL): WEL_STRING
			-- Return a shared wel string set to s if
			-- s.count < `maximum_buffered_string_size`, otherwise
			-- return a new WEL_STRING object set to s.
			-- (from WEL_SHARED_TEMPORARY_OBJECTS)
		require -- from WEL_SHARED_TEMPORARY_OBJECTS
			s_not_void: s /= Void

	wel_string_from_string_with_newline_conversion (s: READABLE_STRING_GENERAL): WEL_STRING
			-- Return a shared wel string set to s if
			-- s.count < `maximum_buffered_string_size`, otherwise
			-- return a new WEL_STRING object set to s.
			-- Make sure all lone '%N' characters are prepended with a carriage return '%R'.
			-- (from WEL_SHARED_TEMPORARY_OBJECTS)
		require -- from WEL_SHARED_TEMPORARY_OBJECTS
			s_not_void: s /= Void

	wel_string_restricted (characters: INTEGER_32): WEL_STRING
			-- Return shared `wel_string` as Result if characters
			-- is less than `maximum_buffered_string_size`, otherwise return a
			-- new WEL_STRING object. This is used to prevent huge strings
			-- from being kept within a system.
			-- (from WEL_SHARED_TEMPORARY_OBJECTS)

	widget_imp_at_pointer_position: detachable EV_WIDGET_IMP
			-- Result is implementation of widget at current
			-- pointer position or Void if none.
			-- (from EV_SHARED_TRANSPORT_IMP)
		require -- from  EV_DOCKABLE_SOURCE_I
			True

	width: INTEGER_32
			-- Width of Current.
			-- (from EV_WIDGET_IMP)
		require -- from  EV_POSITIONED_I
			True
		require -- from EV_SIZEABLE_IMP
			not_is_destroyed: not is_destroyed

	Wm_activate: INTEGER_32 = 6
			-- Declared in Windows as WM_ACTIVATE
			-- (from WEL_WM_CONSTANTS)

	Wm_activateapp: INTEGER_32 = 28
			-- Declared in Windows as WM_ACTIVATEAPP
			-- (from WEL_WM_CONSTANTS)

	Wm_afxfirst: INTEGER_32 = 864
			-- Declared in Windows as WM_AFXFIRST
			-- (from WEL_WM_CONSTANTS)

	Wm_afxlast: INTEGER_32 = 895
			-- Declared in Windows as WM_AFXLAST
			-- (from WEL_WM_CONSTANTS)

	Wm_app: INTEGER_32 = 32768
			-- Declared in Windows as WM_APP
			-- (from WEL_WM_CONSTANTS)

	Wm_appcommand: INTEGER_32 = 793
			-- Declared in Windows as WM_APPCOMMAND
			-- (from WEL_WM_CONSTANTS)

	Wm_askcbformatname: INTEGER_32 = 780
			-- Declared in Windows as WM_ASKCBFORMATNAME
			-- (from WEL_WM_CONSTANTS)

	Wm_canceljournal: INTEGER_32 = 75
			-- Declared in Windows as WM_CANCELJOURNAL
			-- (from WEL_WM_CONSTANTS)

	Wm_cancelmode: INTEGER_32 = 31
			-- Declared in Windows as WM_CANCELMODE
			-- (from WEL_WM_CONSTANTS)

	Wm_capturechanged: INTEGER_32 = 533
			-- Declared in Windows as WM_CAPTURECHANGED
			-- (from WEL_WM_CONSTANTS)

	Wm_changecbchain: INTEGER_32 = 781
			-- Declared in Windows as WM_CHANGECBCHAIN
			-- (from WEL_WM_CONSTANTS)

	Wm_changeuistate: INTEGER_32 = 295
			-- Declared in Windows as WM_CHANGEUISTATE
			-- (from WEL_WM_CONSTANTS)

	Wm_char: INTEGER_32 = 258
			-- Declared in Windows as WM_CHAR
			-- (from WEL_WM_CONSTANTS)

	Wm_chartoitem: INTEGER_32 = 47
			-- Declared in Windows as WM_CHARTOITEM
			-- (from WEL_WM_CONSTANTS)

	Wm_childactivate: INTEGER_32 = 34
			-- Declared in Windows as WM_CHILDACTIVATE
			-- (from WEL_WM_CONSTANTS)

	Wm_clear: INTEGER_32 = 771
			-- Declared in Windows as WM_CLEAR
			-- (from WEL_WM_CONSTANTS)

	Wm_close: INTEGER_32 = 16
			-- Declared in Windows as WM_CLOSE
			-- (from WEL_WM_CONSTANTS)

	Wm_command: INTEGER_32 = 273
			-- Declared in Windows as WM_COMMAND
			-- (from WEL_WM_CONSTANTS)

	Wm_commnotify: INTEGER_32 = 68
			-- Declared in Windows as WM_COMMNOTIFY
			-- (from WEL_WM_CONSTANTS)

	Wm_compacting: INTEGER_32 = 65
			-- Declared in Windows as WM_COMPACTING
			-- (from WEL_WM_CONSTANTS)

	Wm_compareitem: INTEGER_32 = 57
			-- Declared in Windows as WM_COMPAREITEM
			-- (from WEL_WM_CONSTANTS)

	Wm_contextmenu: INTEGER_32 = 123
			-- Declared in Windows as WM_CONTEXTMENU
			-- (from WEL_WM_CONSTANTS)

	Wm_copy: INTEGER_32 = 769
			-- Declared in Windows as WM_COPY
			-- (from WEL_WM_CONSTANTS)

	Wm_copydata: INTEGER_32 = 74
			-- Declared in Windows as WM_COPYDATA
			-- (from WEL_WM_CONSTANTS)

	Wm_create: INTEGER_32 = 1
			-- Declared in Windows as WM_CREATE
			-- (from WEL_WM_CONSTANTS)

	Wm_ctlcolordialog: INTEGER_32 = 310
			-- Declared in Windows as WM_CTLCOLORDIALOG
			-- (from WEL_WM_CONSTANTS)

	Wm_cut: INTEGER_32 = 768
			-- Declared in Windows as WM_CUT
			-- (from WEL_WM_CONSTANTS)

	Wm_deadchar: INTEGER_32 = 259
			-- Declared in Windows as WM_DEADCHAR
			-- (from WEL_WM_CONSTANTS)

	Wm_deleteitem: INTEGER_32 = 45
			-- Declared in Windows as WM_DELETEITEM
			-- (from WEL_WM_CONSTANTS)

	Wm_destroy: INTEGER_32 = 2
			-- Declared in Windows as WM_DESTROY
			-- (from WEL_WM_CONSTANTS)

	Wm_destroyclipboard: INTEGER_32 = 775
			-- Declared in Windows as WM_DESTROYCLIPBOARD
			-- (from WEL_WM_CONSTANTS)

	Wm_devicechange: INTEGER_32 = 537
			-- Declared in Windows as WM_DEVICECHANGE
			-- (from WEL_WM_CONSTANTS)

	Wm_devmodechange: INTEGER_32 = 27
			-- Declared in Windows as WM_DEVMODECHANGE
			-- (from WEL_WM_CONSTANTS)

	Wm_displaychange: INTEGER_32 = 126
			-- Declared in Windows as WM_DISPLAYCHANGE
			-- (from WEL_WM_CONSTANTS)

	Wm_dpichanged: INTEGER_32 = 736
			-- Declared in Windows as WM_DPICHANGED
			-- (from WEL_WM_CONSTANTS)

	Wm_drawclipboard: INTEGER_32 = 776
			-- Declared in Windows as WM_DRAWCLIPBOARD
			-- (from WEL_WM_CONSTANTS)

	Wm_drawitem: INTEGER_32 = 43
			-- Declared in Windows as WM_DRAWITEM
			-- (from WEL_WM_CONSTANTS)

	Wm_dropfiles: INTEGER_32 = 563
			-- Declared in Windows as WM_DROPFILES
			-- (from WEL_WM_CONSTANTS)

	Wm_enable: INTEGER_32 = 10
			-- Declared in Windows as WM_ENABLE
			-- (from WEL_WM_CONSTANTS)

	Wm_endsession: INTEGER_32 = 22
			-- Declared in Windows as WM_ENDSESSION
			-- (from WEL_WM_CONSTANTS)

	Wm_enteridle: INTEGER_32 = 289
			-- Declared in Windows as WM_ENTERIDLE
			-- (from WEL_WM_CONSTANTS)

	Wm_entermenuloop: INTEGER_32 = 529
			-- Declared in Windows as WM_ENTERMENULOOP
			-- (from WEL_WM_CONSTANTS)

	Wm_entersizemove: INTEGER_32 = 561
			-- Declared in Windows as WM_ENTERSIZEMOVE
			-- (from WEL_WM_CONSTANTS)

	Wm_erasebkgnd: INTEGER_32 = 20
			-- Declared in Windows as WM_ERASEBKGND
			-- (from WEL_WM_CONSTANTS)

	Wm_exitmenuloop: INTEGER_32 = 530
			-- Declared in Windows as WM_EXITMENULOOP
			-- (from WEL_WM_CONSTANTS)

	Wm_exitsizemove: INTEGER_32 = 562
			-- Declared in Windows as WM_EXITSIZEMOVE
			-- (from WEL_WM_CONSTANTS)

	Wm_fontchange: INTEGER_32 = 29
			-- Declared in Windows as WM_FONTCHANGE
			-- (from WEL_WM_CONSTANTS)

	Wm_getdlgcode: INTEGER_32 = 135
			-- Declared in Windows as WM_GETDLGCODE
			-- (from WEL_WM_CONSTANTS)

	Wm_getfont: INTEGER_32 = 49
			-- Declared in Windows as WM_GETFONT
			-- (from WEL_WM_CONSTANTS)

	Wm_gethotkey: INTEGER_32 = 51
			-- Declared in Windows as WM_GETHOTKEY
			-- (from WEL_WM_CONSTANTS)

	Wm_geticon: INTEGER_32 = 127
			-- Declared in Windows as WM_GETICON
			-- (from WEL_WM_CONSTANTS)

	Wm_getminmaxinfo: INTEGER_32 = 36
			-- Declared in Windows as WM_GETMINMAXINFO
			-- (from WEL_WM_CONSTANTS)

	Wm_getobject: INTEGER_32 = 61
			-- Declared in Windows as WM_GETOBJECT
			-- (from WEL_WM_CONSTANTS)

	Wm_gettext: INTEGER_32 = 13
			-- Declared in Windows as WM_GETTEXT
			-- (from WEL_WM_CONSTANTS)

	Wm_gettextlength: INTEGER_32 = 14
			-- Declared in Windows as WM_GETTEXTLENGTH
			-- (from WEL_WM_CONSTANTS)

	Wm_handheldfirst: INTEGER_32 = 856
			-- Declared in Windows as WM_HANDHELDFIRST
			-- (from WEL_WM_CONSTANTS)

	Wm_handheldlast: INTEGER_32 = 863
			-- Declared in Windows as WM_HANDHELDLAST
			-- (from WEL_WM_CONSTANTS)

	Wm_help: INTEGER_32 = 83
			-- Declared in Windows as WM_HELP
			-- (from WEL_WM_CONSTANTS)

	Wm_hotkey: INTEGER_32 = 786
			-- Declared in Windows as WM_HOTKEY
			-- (from WEL_WM_CONSTANTS)

	Wm_hscroll: INTEGER_32 = 276
			-- Declared in Windows as WM_HSCROLL
			-- (from WEL_WM_CONSTANTS)

	Wm_hscrollclipboard: INTEGER_32 = 782
			-- Declared in Windows as WM_HSCROLLCLIPBOARD
			-- (from WEL_WM_CONSTANTS)

	Wm_iconerasebkgnd: INTEGER_32 = 39
			-- Declared in Windows as WM_ICONERASEBKGND
			-- (from WEL_WM_CONSTANTS)

	Wm_ime_char: INTEGER_32 = 646
			-- Declared in Windows as WM_IME_CHAR
			-- (from WEL_WM_CONSTANTS)

	Wm_ime_composition: INTEGER_32 = 271
			-- Declared in Windows as WM_IME_COMPOSITION
			-- (from WEL_WM_CONSTANTS)

	Wm_ime_compositionfull: INTEGER_32 = 644
			-- Declared in Windows as WM_IME_COMPOSITIONFULL
			-- (from WEL_WM_CONSTANTS)

	Wm_ime_control: INTEGER_32 = 643
			-- Declared in Windows as WM_IME_CONTROL
			-- (from WEL_WM_CONSTANTS)

	Wm_ime_endcomposition: INTEGER_32 = 270
			-- Declared in Windows as WM_IME_ENDCOMPOSITION
			-- (from WEL_WM_CONSTANTS)

	Wm_ime_keydown: INTEGER_32 = 656
			-- Declared in Windows as WM_IME_KEYDOWN
			-- (from WEL_WM_CONSTANTS)

	wm_ime_keylast: INTEGER_32
			-- Declared in Windows as WM_IME_KEYLAST
			-- (from WEL_WM_CONSTANTS)

	Wm_ime_keyup: INTEGER_32 = 657
			-- Declared in Windows as WM_IME_KEYUP
			-- (from WEL_WM_CONSTANTS)

	Wm_ime_notify: INTEGER_32 = 642
			-- Declared in Windows as WM_IME_NOTIFY
			-- (from WEL_WM_CONSTANTS)

	Wm_ime_request: INTEGER_32 = 648
			-- Declared in Windows as WM_IME_REQUEST
			-- (from WEL_WM_CONSTANTS)

	Wm_ime_select: INTEGER_32 = 645
			-- Declared in Windows as WM_IME_SELECT
			-- (from WEL_WM_CONSTANTS)

	Wm_ime_setcontext: INTEGER_32 = 641
			-- Declared in Windows as WM_IME_SETCONTEXT
			-- (from WEL_WM_CONSTANTS)

	Wm_ime_startcomposition: INTEGER_32 = 269
			-- Declared in Windows as WM_IME_STARTCOMPOSITION
			-- (from WEL_WM_CONSTANTS)

	Wm_initdialog: INTEGER_32 = 272
			-- Declared in Windows as WM_INITDIALOG
			-- (from WEL_WM_CONSTANTS)

	Wm_initmenu: INTEGER_32 = 278
			-- Declared in Windows as WM_INITMENU
			-- (from WEL_WM_CONSTANTS)

	Wm_initmenupopup: INTEGER_32 = 279
			-- Declared in Windows as WM_INITMENUPOPUP
			-- (from WEL_WM_CONSTANTS)

	Wm_inputlangchange: INTEGER_32 = 81
			-- Declared in Windows as WM_INPUTLANGCHANGE
			-- (from WEL_WM_CONSTANTS)

	Wm_inputlangchangerequest: INTEGER_32 = 80
			-- Declared in Windows as WM_INPUTLANGCHANGEREQUEST
			-- (from WEL_WM_CONSTANTS)

	Wm_keydown: INTEGER_32 = 256
			-- Declared in Windows as WM_KEYDOWN
			-- (from WEL_WM_CONSTANTS)

	Wm_keyfirst: INTEGER_32 = 256
			-- Declared in Windows as WM_KEYFIRST
			-- (from WEL_WM_CONSTANTS)

	wm_keylast: INTEGER_32
			-- Declared in Windows as WM_KEYLAST
			-- (from WEL_WM_CONSTANTS)

	Wm_keyup: INTEGER_32 = 257
			-- Declared in Windows as WM_KEYUP
			-- (from WEL_WM_CONSTANTS)

	Wm_killfocus: INTEGER_32 = 8
			-- Declared in Windows as WM_KILLFOCUS
			-- (from WEL_WM_CONSTANTS)

	Wm_lbuttondblclk: INTEGER_32 = 515
			-- Declared in Windows as WM_LBUTTONDBLCLK
			-- (from WEL_WM_CONSTANTS)

	Wm_lbuttondown: INTEGER_32 = 513
			-- Declared in Windows as WM_LBUTTONDOWN
			-- (from WEL_WM_CONSTANTS)

	Wm_lbuttonup: INTEGER_32 = 514
			-- Declared in Windows as WM_LBUTTONUP
			-- (from WEL_WM_CONSTANTS)

	Wm_mbuttondblclk: INTEGER_32 = 521
			-- Declared in Windows as WM_MBUTTONDBLCLK
			-- (from WEL_WM_CONSTANTS)

	Wm_mbuttondown: INTEGER_32 = 519
			-- Declared in Windows as WM_MBUTTONDOWN
			-- (from WEL_WM_CONSTANTS)

	Wm_mbuttonup: INTEGER_32 = 520
			-- Declared in Windows as WM_MBUTTONUP
			-- (from WEL_WM_CONSTANTS)

	Wm_mdiactivate: INTEGER_32 = 546
			-- Declared in Windows as WM_MDIACTIVATE
			-- (from WEL_WM_CONSTANTS)

	Wm_mdicascade: INTEGER_32 = 551
			-- Declared in Windows as WM_MDICASCADE
			-- (from WEL_WM_CONSTANTS)

	Wm_mdicreate: INTEGER_32 = 544
			-- Declared in Windows as WM_MDICREATE
			-- (from WEL_WM_CONSTANTS)

	Wm_mdidestroy: INTEGER_32 = 545
			-- Declared in Windows as WM_MDIDESTROY
			-- (from WEL_WM_CONSTANTS)

	Wm_mdigetactive: INTEGER_32 = 553
			-- Declared in Windows as WM_MDIGETACTIVE
			-- (from WEL_WM_CONSTANTS)

	Wm_mdiiconarrange: INTEGER_32 = 552
			-- Declared in Windows as WM_MDIICONARRANGE
			-- (from WEL_WM_CONSTANTS)

	Wm_mdimaximize: INTEGER_32 = 549
			-- Declared in Windows as WM_MDIMAXIMIZE
			-- (from WEL_WM_CONSTANTS)

	Wm_mdinext: INTEGER_32 = 548
			-- Declared in Windows as WM_MDINEXT
			-- (from WEL_WM_CONSTANTS)

	Wm_mdirefreshmenu: INTEGER_32 = 564
			-- Declared in Windows as WM_MDIREFRESHMENU
			-- (from WEL_WM_CONSTANTS)

	Wm_mdirestore: INTEGER_32 = 547
			-- Declared in Windows as WM_MDIRESTORE
			-- (from WEL_WM_CONSTANTS)

	Wm_mdisetmenu: INTEGER_32 = 560
			-- Declared in Windows as WM_MDISETMENU
			-- (from WEL_WM_CONSTANTS)

	Wm_mditile: INTEGER_32 = 550
			-- Declared in Windows as WM_MDITILE
			-- (from WEL_WM_CONSTANTS)

	Wm_measureitem: INTEGER_32 = 44
			-- Declared in Windows as WM_MEASUREITEM
			-- (from WEL_WM_CONSTANTS)

	Wm_menuchar: INTEGER_32 = 288
			-- Declared in Windows as WM_MENUCHAR
			-- (from WEL_WM_CONSTANTS)

	Wm_menucommand: INTEGER_32 = 294
			-- Declared in Windows as WM_MENUCOMMAND
			-- (from WEL_WM_CONSTANTS)

	Wm_menudrag: INTEGER_32 = 291
			-- Declared in Windows as WM_MENUDRAG
			-- (from WEL_WM_CONSTANTS)

	Wm_menugetobject: INTEGER_32 = 292
			-- Declared in Windows as WM_MENUGETOBJECT
			-- (from WEL_WM_CONSTANTS)

	Wm_menurbuttonup: INTEGER_32 = 290
			-- Declared in Windows as WM_MENURBUTTONUP
			-- (from WEL_WM_CONSTANTS)

	Wm_menuselect: INTEGER_32 = 287
			-- Declared in Windows as WM_MENUSELECT
			-- (from WEL_WM_CONSTANTS)

	Wm_mouseactivate: INTEGER_32 = 33
			-- Declared in Windows as WM_MOUSEACTIVATE
			-- (from WEL_WM_CONSTANTS)

	Wm_mousefirst: INTEGER_32 = 512
			-- Declared in Windows as WM_MOUSEFIRST
			-- (from WEL_WM_CONSTANTS)

	Wm_mousehover: INTEGER_32 = 673
			-- Require Windows98, Windows NT 4.0 or later
			-- Declared in Windows as WM_MOUSEHOVER
			-- (from WEL_WM_CONSTANTS)

	wm_mouselast: INTEGER_32
			-- Declared in Windows as WM_MOUSELAST
			-- (from WEL_WM_CONSTANTS)

	Wm_mouseleave: INTEGER_32 = 675
			-- Require Windows98, Windows NT 4.0 or later
			-- Declared in Windows as WM_MOUSELEAVE
			-- (from WEL_WM_CONSTANTS)

	Wm_mousemove: INTEGER_32 = 512
			-- Declared in Windows as WM_MOUSEMOVE
			-- (from WEL_WM_CONSTANTS)

	Wm_mousewheel: INTEGER_32 = 522
			-- Declared in Windows as WM_MOUSEWHEEL
			-- (from WEL_WM_CONSTANTS)

	Wm_move: INTEGER_32 = 3
			-- Declared in Windows as WM_MOVE
			-- (from WEL_WM_CONSTANTS)

	Wm_moving: INTEGER_32 = 534
			-- Declared in Windows as WM_MOVING
			-- (from WEL_WM_CONSTANTS)

	Wm_ncactivate: INTEGER_32 = 134
			-- Declared in Windows as WM_NCACTIVATE
			-- (from WEL_WM_CONSTANTS)

	Wm_nccalcsize: INTEGER_32 = 131
			-- Declared in Windows as WM_NCCALCSIZE
			-- (from WEL_WM_CONSTANTS)

	Wm_nccreate: INTEGER_32 = 129
			-- Declared in Windows as WM_NCCREATE
			-- (from WEL_WM_CONSTANTS)

	Wm_ncdestroy: INTEGER_32 = 130
			-- Declared in Windows as WM_NCDESTROY
			-- (from WEL_WM_CONSTANTS)

	Wm_nchittest: INTEGER_32 = 132
			-- Declared in Windows as WM_NCHITTEST
			-- (from WEL_WM_CONSTANTS)

	Wm_nclbuttondblclk: INTEGER_32 = 163
			-- Declared in Windows as WM_NCLBUTTONDBLCLK
			-- (from WEL_WM_CONSTANTS)

	Wm_nclbuttondown: INTEGER_32 = 161
			-- Declared in Windows as WM_NCLBUTTONDOWN
			-- (from WEL_WM_CONSTANTS)

	Wm_nclbuttonup: INTEGER_32 = 162
			-- Declared in Windows as WM_NCLBUTTONUP
			-- (from WEL_WM_CONSTANTS)

	Wm_ncmbuttondblclk: INTEGER_32 = 169
			-- Declared in Windows as WM_NCMBUTTONDBLCLK
			-- (from WEL_WM_CONSTANTS)

	Wm_ncmbuttondown: INTEGER_32 = 167
			-- Declared in Windows as WM_NCMBUTTONDOWN
			-- (from WEL_WM_CONSTANTS)

	Wm_ncmbuttonup: INTEGER_32 = 168
			-- Declared in Windows as WM_NCMBUTTONUP
			-- (from WEL_WM_CONSTANTS)

	Wm_ncmousehover: INTEGER_32 = 672
			-- Require Windows98, Windows NT 5.0 or later
			-- Declared in Windows as WM_NCMOUSEHOVER
			-- (from WEL_WM_CONSTANTS)

	Wm_ncmouseleave: INTEGER_32 = 674
			-- Require Windows98, Windows NT 5.0 or later
			-- Declared in Windows as WM_NCMOUSELEAVE
			-- (from WEL_WM_CONSTANTS)

	Wm_ncmousemove: INTEGER_32 = 160
			-- Declared in Windows as WM_NCMOUSEMOVE
			-- (from WEL_WM_CONSTANTS)

	Wm_ncpaint: INTEGER_32 = 133
			-- Declared in Windows as WM_NCPAINT
			-- (from WEL_WM_CONSTANTS)

	Wm_ncrbuttondblclk: INTEGER_32 = 166
			-- Declared in Windows as WM_NCRBUTTONDBLCLK
			-- (from WEL_WM_CONSTANTS)

	Wm_ncrbuttondown: INTEGER_32 = 164
			-- Declared in Windows as WM_NCRBUTTONDOWN
			-- (from WEL_WM_CONSTANTS)

	Wm_ncrbuttonup: INTEGER_32 = 165
			-- Declared in Windows as WM_NCRBUTTONUP
			-- (from WEL_WM_CONSTANTS)

	Wm_ncxbuttondblclk: INTEGER_32 = 173
			-- Declared in Windows as WM_NCXBUTTONDBLCLK
			-- (from WEL_WM_CONSTANTS)

	Wm_ncxbuttondown: INTEGER_32 = 171
			-- Declared in Windows as WM_NCXBUTTONDOWN
			-- (from WEL_WM_CONSTANTS)

	Wm_ncxbuttonup: INTEGER_32 = 172
			-- Declared in Windows as WM_NCXBUTTONUP
			-- (from WEL_WM_CONSTANTS)

	Wm_nextdlgctl: INTEGER_32 = 40
			-- Declared in Windows as WM_NEXTDLGCTL
			-- (from WEL_WM_CONSTANTS)

	Wm_nextmenu: INTEGER_32 = 531
			-- Declared in Windows as WM_NEXTMENU
			-- (from WEL_WM_CONSTANTS)

	Wm_notify: INTEGER_32 = 78
			-- Declared in Windows as WM_NOTIFY
			-- (from WEL_WM_CONSTANTS)

	Wm_notifyformat: INTEGER_32 = 85
			-- Declared in Windows as WM_NOTIFYFORMAT
			-- (from WEL_WM_CONSTANTS)

	Wm_null: INTEGER_32 = 0
			-- Declared in Windows as WM_NULL
			-- (from WEL_WM_CONSTANTS)

	Wm_paint: INTEGER_32 = 15
			-- Declared in Windows as WM_PAINT
			-- (from WEL_WM_CONSTANTS)

	Wm_paintclipboard: INTEGER_32 = 777
			-- Declared in Windows as WM_PAINTCLIPBOARD
			-- (from WEL_WM_CONSTANTS)

	Wm_painticon: INTEGER_32 = 38
			-- Declared in Windows as WM_PAINTICON
			-- (from WEL_WM_CONSTANTS)

	Wm_palettechanged: INTEGER_32 = 785
			-- Declared in Windows as WM_PALETTECHANGED
			-- (from WEL_WM_CONSTANTS)

	Wm_paletteischanging: INTEGER_32 = 784
			-- Declared in Windows as WM_PALETTEISCHANGING
			-- (from WEL_WM_CONSTANTS)

	Wm_parentnotify: INTEGER_32 = 528
			-- Declared in Windows as WM_PARENTNOTIFY
			-- (from WEL_WM_CONSTANTS)

	Wm_paste: INTEGER_32 = 770
			-- Declared in Windows as WM_PASTE
			-- (from WEL_WM_CONSTANTS)

	Wm_penwinfirst: INTEGER_32 = 896
			-- Declared in Windows as WM_PENWINFIRST
			-- (from WEL_WM_CONSTANTS)

	Wm_penwinlast: INTEGER_32 = 911
			-- Declared in Windows as WM_PENWINLAST
			-- (from WEL_WM_CONSTANTS)

	Wm_power: INTEGER_32 = 72
			-- Declared in Windows as WM_POWER
			-- (from WEL_WM_CONSTANTS)

	Wm_powerbroadcast: INTEGER_32 = 536
			-- Declared in Windows as WM_POWERBROADCAST
			-- (from WEL_WM_CONSTANTS)

	Wm_print: INTEGER_32 = 791
			-- Declared in Windows as WM_PRINT
			-- (from WEL_WM_CONSTANTS)

	Wm_printclient: INTEGER_32 = 792
			-- Declared in Windows as WM_PRINTCLIENT
			-- (from WEL_WM_CONSTANTS)

	Wm_querydragicon: INTEGER_32 = 55
			-- Declared in Windows as WM_QUERYDRAGICON
			-- (from WEL_WM_CONSTANTS)

	Wm_queryendsession: INTEGER_32 = 17
			-- Declared in Windows as WM_QUERYENDSESSION
			-- (from WEL_WM_CONSTANTS)

	Wm_querynewpalette: INTEGER_32 = 783
			-- Declared in Windows as WM_QUERYNEWPALETTE
			-- (from WEL_WM_CONSTANTS)

	Wm_queryopen: INTEGER_32 = 19
			-- Declared in Windows as WM_QUERYOPEN
			-- (from WEL_WM_CONSTANTS)

	Wm_queryuistate: INTEGER_32 = 297
			-- Declared in Windows as WM_QUERYUISTATE
			-- (from WEL_WM_CONSTANTS)

	Wm_queuesync: INTEGER_32 = 35
			-- Declared in Windows as WM_QUEUESYNC
			-- (from WEL_WM_CONSTANTS)

	Wm_quit: INTEGER_32 = 18
			-- Declared in Windows as WM_QUIT
			-- (from WEL_WM_CONSTANTS)

	Wm_rbuttondblclk: INTEGER_32 = 518
			-- Declared in Windows as WM_RBUTTONDBLCLK
			-- (from WEL_WM_CONSTANTS)

	Wm_rbuttondown: INTEGER_32 = 516
			-- Declared in Windows as WM_RBUTTONDOWN
			-- (from WEL_WM_CONSTANTS)

	Wm_rbuttonup: INTEGER_32 = 517
			-- Declared in Windows as WM_RBUTTONUP
			-- (from WEL_WM_CONSTANTS)

	Wm_renderallformats: INTEGER_32 = 774
			-- Declared in Windows as WM_RENDERALLFORMATS
			-- (from WEL_WM_CONSTANTS)

	Wm_renderformat: INTEGER_32 = 773
			-- Declared in Windows as WM_RENDERFORMAT
			-- (from WEL_WM_CONSTANTS)

	Wm_set_window_pos_msg: INTEGER_32 = 1025
			-- Our own messaging
			-- (from WEL_RESIZING_SUPPORT)

	Wm_setcursor: INTEGER_32 = 32
			-- Declared in Windows as WM_SETCURSOR
			-- (from WEL_WM_CONSTANTS)

	Wm_setfocus: INTEGER_32 = 7
			-- Declared in Windows as WM_SETFOCUS
			-- (from WEL_WM_CONSTANTS)

	Wm_setfont: INTEGER_32 = 48
			-- Declared in Windows as WM_SETFONT
			-- (from WEL_WM_CONSTANTS)

	Wm_sethotkey: INTEGER_32 = 50
			-- Declared in Windows as WM_SETHOTKEY
			-- (from WEL_WM_CONSTANTS)

	Wm_seticon: INTEGER_32 = 128
			-- Declared in Windows as WM_SETICON
			-- (from WEL_WM_CONSTANTS)

	Wm_setredraw: INTEGER_32 = 11
			-- Declared in Windows as WM_SETREDRAW
			-- (from WEL_WM_CONSTANTS)

	Wm_settext: INTEGER_32 = 12
			-- Declared in Windows as WM_SETTEXT
			-- (from WEL_WM_CONSTANTS)

	Wm_settingchange: INTEGER_32 = 26
			-- Declared in Windows as WM_WININICHANGE
			-- Was declared in {WEL_WM_CONSTANTS} as synonym of `wm_wininichange`.
			-- (from WEL_WM_CONSTANTS)

	Wm_showwindow: INTEGER_32 = 24
			-- Declared in Windows as WM_SHOWWINDOW
			-- (from WEL_WM_CONSTANTS)

	Wm_size: INTEGER_32 = 5
			-- Declared in Windows as WM_SIZE
			-- (from WEL_WM_CONSTANTS)

	Wm_sizeclipboard: INTEGER_32 = 779
			-- Declared in Windows as WM_SIZECLIPBOARD
			-- (from WEL_WM_CONSTANTS)

	Wm_sizing: INTEGER_32 = 532
			-- Declared in Windows as WM_SIZING
			-- (from WEL_WM_CONSTANTS)

	Wm_spoolerstatus: INTEGER_32 = 42
			-- Declared in Windows as WM_SPOOLERSTATUS
			-- (from WEL_WM_CONSTANTS)

	Wm_stylechanged: INTEGER_32 = 125
			-- Declared in Windows as WM_STYLECHANGED
			-- (from WEL_WM_CONSTANTS)

	Wm_stylechanging: INTEGER_32 = 124
			-- Declared in Windows as WM_STYLECHANGING
			-- (from WEL_WM_CONSTANTS)

	Wm_syncpaint: INTEGER_32 = 136
			-- Declared in Windows as WM_SYNCPAINT
			-- (from WEL_WM_CONSTANTS)

	Wm_syschar: INTEGER_32 = 262
			-- Declared in Windows as WM_SYSCHAR
			-- (from WEL_WM_CONSTANTS)

	Wm_syscolorchange: INTEGER_32 = 21
			-- Declared in Windows as WM_SYSCOLORCHANGE
			-- (from WEL_WM_CONSTANTS)

	Wm_syscommand: INTEGER_32 = 274
			-- Declared in Windows as WM_SYSCOMMAND
			-- (from WEL_WM_CONSTANTS)

	Wm_sysdeadchar: INTEGER_32 = 263
			-- Declared in Windows as WM_SYSDEADCHAR
			-- (from WEL_WM_CONSTANTS)

	Wm_syskeydown: INTEGER_32 = 260
			-- Declared in Windows as WM_SYSKEYDOWN
			-- (from WEL_WM_CONSTANTS)

	Wm_syskeyup: INTEGER_32 = 261
			-- Declared in Windows as WM_SYSKEYUP
			-- (from WEL_WM_CONSTANTS)

	Wm_tcard: INTEGER_32 = 82
			-- Declared in Windows as WM_TCARD
			-- (from WEL_WM_CONSTANTS)

	Wm_themechanged: INTEGER_32 = 794
			-- Declared in Windows as WM_THEMECHANGED
			-- (from WEL_WM_CONSTANTS)

	Wm_timechange: INTEGER_32 = 30
			-- Declared in Windows as WM_TIMECHANGE
			-- (from WEL_WM_CONSTANTS)

	Wm_timer: INTEGER_32 = 275
			-- Declared in Windows as WM_TIMER
			-- (from WEL_WM_CONSTANTS)

	Wm_undo: INTEGER_32 = 772
			-- Declared in Windows as WM_UNDO
			-- (from WEL_WM_CONSTANTS)

	Wm_uninitmenupopup: INTEGER_32 = 293
			-- Declared in Windows as WM_UNINITMENUPOPUP
			-- (from WEL_WM_CONSTANTS)

	Wm_updateuistate: INTEGER_32 = 296
			-- Declared in Windows as WM_UPDATEUISTATE
			-- (from WEL_WM_CONSTANTS)

	Wm_user: INTEGER_32 = 1024
			-- Declared in Windows as WM_USER
			-- (from WEL_WM_CONSTANTS)

	Wm_userchanged: INTEGER_32 = 84
			-- Declared in Windows as WM_USERCHANGED
			-- (from WEL_WM_CONSTANTS)

	Wm_vkeytoitem: INTEGER_32 = 46
			-- Declared in Windows as WM_VKEYTOITEM
			-- (from WEL_WM_CONSTANTS)

	Wm_vscroll: INTEGER_32 = 277
			-- Declared in Windows as WM_VSCROLL
			-- (from WEL_WM_CONSTANTS)

	Wm_vscrollclipboard: INTEGER_32 = 778
			-- Declared in Windows as WM_VSCROLLCLIPBOARD
			-- (from WEL_WM_CONSTANTS)

	Wm_windowposchanged: INTEGER_32 = 71
			-- Declared in Windows as WM_WINDOWPOSCHANGED
			-- (from WEL_WM_CONSTANTS)

	Wm_windowposchanging: INTEGER_32 = 70
			-- Declared in Windows as WM_WINDOWPOSCHANGING
			-- (from WEL_WM_CONSTANTS)

	Wm_wininichange: INTEGER_32 = 26
			-- Declared in Windows as WM_WININICHANGE
			-- Was declared in {WEL_WM_CONSTANTS} as synonym of `wm_settingchange`.
			-- (from WEL_WM_CONSTANTS)

	Wm_xbuttondblclk: INTEGER_32 = 525
			-- Declared in Windows as WM_XBUTTONDBLCLK
			-- (from WEL_WM_CONSTANTS)

	Wm_xbuttondown: INTEGER_32 = 523
			-- Declared in Windows as WM_XBUTTONDOWN
			-- (from WEL_WM_CONSTANTS)

	Wm_xbuttonup: INTEGER_32 = 524
			-- Declared in Windows as WM_XBUTTONUP
			-- (from WEL_WM_CONSTANTS)

	x_position: INTEGER_32
			-- Result is x_position of Current in pixels.
			-- If `wel_parent` not Void then Result is relative to `wel_parent` else
			-- Result is relative to screen.
			-- (from EV_WIDGET_IMP)
		require -- from  EV_POSITIONED_I
			True
		require -- from EV_SIZEABLE_IMP
			not_is_destroyed: not is_destroyed
		require -- from WEL_WINDOW
			exists: exists
		ensure -- from WEL_WINDOW
			wel_parent = Void implies Result = absolute_x

	y_position: INTEGER_32
			-- Result is x_position of Current in pixels.
			-- If `wel_parent` not Void then Result is relative to `wel_parent` else
			-- Result is relative to screen.
			-- (from EV_WIDGET_IMP)
		require -- from  EV_POSITIONED_I
			True
		require -- from EV_SIZEABLE_IMP
			not_is_destroyed: not is_destroyed
		require -- from WEL_WINDOW
			exists: exists
		ensure -- from WEL_WINDOW
			wel_parent = Void implies Result = absolute_y
	
feature -- Measurement

	dpi: NATURAL_32
			-- Window dpi.
			-- (from EV_POSITIONED_I)
	
feature -- Comparison

	frozen deep_equal (a: detachable ANY; b: like arg #1): BOOLEAN
			-- Are a and b either both void
			-- or attached to isomorphic object structures?
			-- (from ANY)
		ensure -- from ANY
			instance_free: class
			shallow_implies_deep: standard_equal (a, b) implies Result
			both_or_none_void: (a = Void) implies (Result = (b = Void))
			same_type: (Result and (a /= Void)) implies (b /= Void and then a.same_type (b))
			symmetric: Result implies deep_equal (b, a)

	frozen equal (a: detachable ANY; b: like arg #1): BOOLEAN
			-- Are a and b either both void or attached
			-- to objects considered equal?
			-- (from ANY)
		ensure -- from ANY
			instance_free: class
			definition: Result = (a = Void and b = Void) or else ((a /= Void and b /= Void) and then a.is_equal (b))

	frozen is_deep_equal alias "≡≡≡" (other: EV_RICH_TEXT_IMP): BOOLEAN
			-- Are Current and other attached to isomorphic object structures?
			-- (from ANY)
		require -- from ANY
			other_not_void: other /= Void
		ensure -- from ANY
			shallow_implies_deep: standard_is_equal (other) implies Result
			same_type: Result implies same_type (other)
			symmetric: Result implies other.is_deep_equal (Current)

	is_equal (other: EV_RICH_TEXT_IMP): BOOLEAN
			-- Is other attached to an object considered
			-- equal to current object?
			-- (from ANY)
		require -- from ANY
			other_not_void: other /= Void
		ensure -- from ANY
			symmetric: Result implies other ~ Current
			consistent: standard_is_equal (other) implies Result

	frozen standard_equal (a: detachable ANY; b: like arg #1): BOOLEAN
			-- Are a and b either both void or attached to
			-- field-by-field identical objects of the same type?
			-- Always uses default object comparison criterion.
			-- (from ANY)
		ensure -- from ANY
			instance_free: class
			definition: Result = (a = Void and b = Void) or else ((a /= Void and b /= Void) and then a.standard_is_equal (b))

	frozen standard_is_equal alias "≜" (other: EV_RICH_TEXT_IMP): BOOLEAN
			-- Is other attached to an object of the same type
			-- as current object, and field-by-field identical to it?
			-- (from ANY)
		require -- from ANY
			other_not_void: other /= Void
		ensure -- from ANY
			same_type: Result implies same_type (other)
			symmetric: Result implies other.standard_is_equal (Current)
	
feature -- Status report

	absolute_x: INTEGER_32
			-- Absolute x position
			-- (from WEL_WINDOW)
		require -- from  EV_WIDGET_IMP
			True
		require -- from WEL_WINDOW
			exists: exists
		ensure -- from WEL_WINDOW
			Result = window_rect.x

	absolute_y: INTEGER_32
			-- Absolute y position
			-- (from WEL_WINDOW)
		require -- from  EV_WIDGET_IMP
			True
		require -- from WEL_WINDOW
			exists: exists
		ensure -- from WEL_WINDOW
			Result = window_rect.y

	background_brush_gdip: detachable WEL_GDIP_BRUSH
			-- GDI+ version of `background_brush`
			-- Result void if GDI+ not available
			-- (from WEL_WINDOW)

	buffer_locked_in_append_mode: BOOLEAN
			-- Is buffered appending underway?
			-- (from EV_RICH_TEXT_I)

	buffer_locked_in_format_mode: BOOLEAN
			-- Is buffered formatting underway?
			-- (from EV_RICH_TEXT_I)

	can_undo: BOOLEAN
			-- Can the last operation be undone?
			-- (from WEL_EDIT)
		require -- from WEL_EDIT
			exists: exists

	caption_height: INTEGER_32
			-- Height of normal caption area
			-- (from WEL_SYSTEM_METRICS)

	captured_window: detachable WEL_WINDOW
			-- Current window which has been captured.
			-- (from WEL_WINDOW)
		require -- from WEL_WINDOW
			exists: exists
			window_captured: window_captured

	caret_position: INTEGER_32
			-- Current position of caret.
			-- (from EV_TEXT_COMPONENT_IMP)
		require -- from  EV_TEXT_COMPONENT_I
			True

	wel_caret_position: INTEGER_32
			-- Caret position
			-- (from WEL_RICH_EDIT)
		require -- from WEL_EDIT
			exists: exists

	character_displayed (an_index: INTEGER_32): BOOLEAN
			-- Is character an_index currently visible in Current?
		require -- from EV_RICH_TEXT_I
			index_valid: an_index >= 1 and an_index <= text_length
		ensure -- from EV_RICH_TEXT_I
			text_not_changed: text.is_equal (old text)
			caret_not_moved: caret_position = old caret_position
			selection_not_changed: old has_selection = has_selection and has_selection implies old start_selection = start_selection and old end_selection = end_selection

	character_format (caret_index: INTEGER_32): EV_CHARACTER_FORMAT
			-- Result is character format at caret position caret_index
		require -- from EV_RICH_TEXT_I
			valid_character_index: caret_index >= 1 and caret_index <= text_length + 1
		ensure -- from EV_RICH_TEXT_I
			result_not_void: Result /= Void
			text_not_changed: text.is_equal (old text)
			caret_not_moved: caret_position = old caret_position
			selection_not_changed: old has_selection = has_selection and has_selection implies old start_selection = start_selection and old end_selection = end_selection

	character_format_contiguous (start_index, end_index: INTEGER_32): BOOLEAN
			-- Is formatting from caret position start_index to end_index contiguous?
		require -- from EV_RICH_TEXT_I
			valid_character_index: start_index >= 1 and end_index <= text_length + 1 and start_index <= end_index
		ensure -- from EV_RICH_TEXT_I
			text_not_changed: text.is_equal (old text)
			caret_not_moved: caret_position = old caret_position
			selection_not_changed: old has_selection = has_selection and has_selection implies old start_selection = start_selection and old end_selection = end_selection

	character_format_range_information (start_index, end_index: INTEGER_32): EV_CHARACTER_FORMAT_RANGE_INFORMATION
			-- Formatting range information from caret position start_index to end_index.
			-- All attributes in Result are set to True if they remain consitent from start_index to
			--end_index and False otherwise.
			-- Result is a snapshot of Current, and does not remain consistent as the contents
			-- are subsequently changed.
		require -- from EV_RICH_TEXT_I
			valid_character_index: start_index >= 1 and end_index <= text_length + 1 and start_index <= end_index
		ensure -- from EV_RICH_TEXT_I
			result_not_void: Result /= Void
			text_not_changed: text.is_equal (old text)
			caret_not_moved: caret_position = old caret_position
			selection_not_changed: old has_selection = has_selection and has_selection implies old start_selection = start_selection and old end_selection = end_selection

	character_index_from_position (a_x, a_y: INTEGER_32): INTEGER_32
			-- Zero-based character index of the character which is
			-- the nearest to a_x and a_y position in the client
			-- area.
			-- A returned coordinate can be negative if the
			-- character has been scrolled outside the edit
			-- control's client area. The coordinates are truncated
			-- to integer values and are in screen units relative
			-- to the upper-left corner of the client area of the
			-- control.
			-- (from WEL_RICH_EDIT)
		require -- from WEL_RICH_EDIT
			exists: exists
			a_x_large_enough: a_x >= 0
			a_y_large_enough: a_y >= 0

	client_rect: WEL_RECT
			-- Client rectangle
			-- (from WEL_WINDOW)
		require -- from  EV_WIDGET_IMP
			True
		require -- from WEL_WINDOW
			exists: exists
		ensure -- from WEL_WINDOW
			result_not_void: Result /= Void

	closest_dockable_target: detachable EV_DOCKABLE_TARGET
			-- Result is first dockable target that `is_dockable` found by recursively
			-- searching up through the parenting structure from the widget
			-- currently underneath the pointer position.
			-- Result will be Void if a dockable target is not found.
			-- (from EV_DOCKABLE_SOURCE_I)
		ensure -- from EV_DOCKABLE_SOURCE_I
			result_is_dockable: Result /= Void implies Result.is_docking_enabled

	command (message: INTEGER_32): WEL_COMMAND
			-- Command associated to message
			-- (from WEL_WINDOW)
		require -- from WEL_WINDOW
			positive_message: message >= 0
			command_exists: command_exists (message)
		ensure -- from WEL_WINDOW
			result_not_void: Result /= Void

	command_argument (message: INTEGER_32): detachable ANY
			-- Command argument associated to message
			-- (from WEL_WINDOW)
		require -- from WEL_WINDOW
			positive_message: message >= 0
			command_exists: command_exists (message)

	command_exists (message: INTEGER_32): BOOLEAN
			-- Does a command associated to message exist?
			-- (from WEL_WINDOW)
		require -- from WEL_WINDOW
			positive_message: message >= 0
		ensure -- from WEL_WINDOW
			definition: Result implies attached commands as l_commands_var and then l_commands_var.item (message) /= Void

	commands_enabled: BOOLEAN
			-- Is the commands execution enabled?
			-- (from WEL_WINDOW)

	complete_loading
			-- Restore Current back to its default state before last call
			-- to `initialize_for_loading`.

	complete_saving
			-- Restore Current back to its default state before last call
			-- to `initialize_for_saving`.

	conforms_to (other: ANY): BOOLEAN
			-- Does type of current object conform to type
			-- of other (as per Eiffel: The Language, chapter 13)?
			-- (from ANY)
		require -- from ANY
			other_not_void: other /= Void

	count: INTEGER_32
			-- Length of text.
			-- (from WEL_RICH_EDIT)

	current_line_index: INTEGER_32
			-- Index of the line that contains the caret.
			-- (from WEL_MULTIPLE_LINE_EDIT)
		require -- from WEL_MULTIPLE_LINE_EDIT
			exists: exists
		ensure -- from WEL_MULTIPLE_LINE_EDIT
			positive_result: Result >= 0

	wel_current_line_number: INTEGER_32
			-- Line number of the line that contains the caret.
			-- (from WEL_MULTIPLE_LINE_EDIT)
		require -- from WEL_MULTIPLE_LINE_EDIT
			exists: exists
		ensure -- from WEL_MULTIPLE_LINE_EDIT
			positive_result: Result >= 0
			result_small_enough: Result < wel_line_count

	current_selection_character_format: WEL_CHARACTER_FORMAT
			-- Current selection character format information
			-- (from WEL_RICH_EDIT)
		require -- from WEL_RICH_EDIT
			exists: exists
		ensure -- from WEL_RICH_EDIT
			result_not_void: Result /= Void

	cursor_height: INTEGER_32
			-- Height of the cursor
			-- (from WEL_SYSTEM_METRICS)

	cursor_width: INTEGER_32
			-- Width of the cursor
			-- (from WEL_SYSTEM_METRICS)

	dbcs_installed: BOOLEAN
			-- Is the double-byte character set (DBCS) version
			-- of USER.EXE installed?
			-- (from WEL_SYSTEM_METRICS)

	debug_installed: BOOLEAN
			-- Is the debugging version of USER.EXE installed?
			-- (from WEL_SYSTEM_METRICS)

	default_character_format: WEL_CHARACTER_FORMAT
			-- Default character format information
			-- (from WEL_RICH_EDIT)
		require -- from WEL_RICH_EDIT
			exists: exists
		ensure -- from WEL_RICH_EDIT
			result_not_void: Result /= Void

	destroyed: BOOLEAN
			-- Is Current destroyed ?
			-- (from EV_WIDGET_IMP)

	dialog_window_frame_height: INTEGER_32
			-- Height of window frame for window that
			-- has the `ws_dlgframe` style
			-- (from WEL_SYSTEM_METRICS)

	dialog_window_frame_width: INTEGER_32
			-- Width of window frame for window that
			-- has the `ws_dlgframe` style
			-- (from WEL_SYSTEM_METRICS)

	double_click_height: INTEGER_32
			-- Height of a rectangle around the location of a
			-- first click in a double-click sequence. The second
			-- click must occur within this rectangle for the
			-- system to consider the two clicks a double-click.
			-- (from WEL_SYSTEM_METRICS)

	double_click_width: INTEGER_32
			-- Width of a rectangle around the location of a
			-- first click in a double-click sequence. The second
			-- click must occur within this rectangle for the
			-- system to consider the two clicks a double-click.
			-- (from WEL_SYSTEM_METRICS)

	enabled: BOOLEAN
			-- Is the window enabled for mouse and keyboard input?
			-- (from WEL_WINDOW)
		require -- from WEL_WINDOW
			exists: exists

	is_sensitive: BOOLEAN
			-- Is the window enabled for mouse and keyboard input?
			-- (from WEL_WINDOW)
		require -- from  EV_SENSITIVE_I
			True
		require -- from WEL_WINDOW
			exists: exists

	end_selection: INTEGER_32
			-- Caret position of the end of selected text if any,
			-- otherwise `caret_position`.
			-- (from EV_TEXT_COMPONENT_IMP)
		require -- from  EV_TEXT_COMPONENT_I
			True
		ensure -- from EV_TEXT_COMPONENT_I
			result_large_enough: Result >= 1
			result_small_enough: Result <= text_length + 1
			consistent_with_selection_end: end_selection >= Result

	event_mask: INTEGER_32
			-- Event mask which specifies notification message the
			-- control sends to its parent window.
			-- See class WEL_ENM_CONSTANTS for values.
			-- (from WEL_RICH_EDIT)
		require -- from WEL_RICH_EDIT
			exists: exists

	ex_style: INTEGER_32
			-- Window ex_style
			-- (from WEL_WINDOW)
		require -- from WEL_WINDOW
			exists: exists

	exists: BOOLEAN
			-- Does the item exist?
			-- (from WEL_ANY)
		require -- from  WEL_COLOR_CONTROL
			True
		require -- from  EV_WIDGET_IMP
			True
		ensure -- from WEL_ANY
			Result = (wel_item /= default_pointer)

	first_position_from_line_number (a_line: INTEGER_32): INTEGER_32
			-- Position of the first character on the i-th line.
		require -- from EV_TEXT_I
			valid_line: valid_line_index (a_line)
		ensure -- from EV_TEXT_I
			valid_caret_position: valid_caret_position (a_line)

	wel_first_visible_line: INTEGER_32
			-- Upper most visible line
			-- (from WEL_MULTIPLE_LINE_EDIT)
		require -- from WEL_MULTIPLE_LINE_EDIT
			exists: exists
		ensure -- from WEL_MULTIPLE_LINE_EDIT
			positive_result: Result >= 0
			result_small_enough: Result < wel_line_count

	flag_set (flags, mask: INTEGER_32): BOOLEAN
			-- Is mask set in flags?
			-- (from WEL_BIT_OPERATIONS)

	focused_window: detachable WEL_WINDOW
			-- Current window which has the focus.
			-- (from WEL_WINDOW)
		require -- from WEL_WINDOW
			exists: exists

	foreground_window: detachable WEL_WINDOW
			-- Foreground window (window with focus)
			-- (from WEL_WINDOWS_ROUTINES)

	formatting_rect: WEL_RECT
			-- Limiting rectangle the text. It is independent of
			-- the size of the edit-control window.
			-- (from WEL_EDIT)
		require -- from WEL_EDIT
			exists: exists
		ensure -- from WEL_EDIT
			result_not_void: Result /= Void

	full_screen_client_area_height: INTEGER_32
			-- Height of the client area for a full-screen window
			-- (from WEL_SYSTEM_METRICS)

	full_screen_client_area_width: INTEGER_32
			-- Width of the client area for a full-screen window
			-- (from WEL_SYSTEM_METRICS)

	get_next_target (a_widget: EV_WIDGET): detachable EV_DOCKABLE_TARGET
			-- Result is next dockable target that is `is_dockable` found by
			-- recursively seraching up the parenting structure from current_target.
			-- Result will be Void if none.
			-- (from EV_DOCKABLE_SOURCE_I)
		require -- from EV_DOCKABLE_SOURCE_I
			a_widget_not_void: a_widget /= Void
		ensure -- from EV_DOCKABLE_SOURCE_I
			result_is_dockable: Result /= Void implies Result.is_docking_enabled

	has_capture: BOOLEAN
			-- Does Current have capture?
			-- (from EV_WIDGET_IMP)
		require -- from  EV_WIDGET_I
			True

	wel_has_capture: BOOLEAN
			-- Does this window have the capture?
			-- (from WEL_WINDOW)
		require -- from  EV_DOCKABLE_SOURCE_IMP
			True
		require -- from WEL_WINDOW
			exists: exists

	has_focus: BOOLEAN
			-- Does this window have the focus?
			-- (from WEL_WINDOW)
		require -- from  EV_WIDGET_I
			True
		require -- from WEL_WINDOW
			exists: exists

	has_horizontal_scroll_bar: BOOLEAN
			-- Does this window have a horizontal scroll bar?
			-- (from WEL_WINDOW)
		require -- from WEL_WINDOW
			exists: exists

	has_selection: BOOLEAN
			-- Has a current selection?
			-- (from WEL_RICH_EDIT)
		require -- from  EV_TEXT_COMPONENT_I
			True
		require -- from WEL_EDIT
			exists: exists

	has_system_font: BOOLEAN
			-- Does the control use the system font?
			-- (from WEL_CONTROL)
		require -- from WEL_CONTROL
			exists: exists

	has_vertical_scroll_bar: BOOLEAN
			-- Does this window have a vertical scroll bar?
			-- (from WEL_WINDOW)
		require -- from WEL_WINDOW
			exists: exists

	wel_height: INTEGER_32
			-- Window height
			-- (from WEL_WINDOW)
		require -- from EV_SIZEABLE_IMP
			not_is_destroyed: not is_destroyed
		require -- from WEL_WINDOW
			exists: exists

	horizontal_scroll_bar_arrow_height: INTEGER_32
			-- Height of arrow bitmap on horizontal scrollbar
			-- (from WEL_SYSTEM_METRICS)

	horizontal_scroll_bar_arrow_width: INTEGER_32
			-- Width of arrow bitmap on horizontal scrollbar
			-- (from WEL_SYSTEM_METRICS)

	horizontal_scroll_bar_thumb_width: INTEGER_32
			-- (from WEL_SYSTEM_METRICS)

	icon_height: INTEGER_32
			-- Height of an icon
			-- (from WEL_SYSTEM_METRICS)

	icon_spacing_height: INTEGER_32
			-- Height of rectangular cell that Program Manager
			-- uses to position tiled icons
			-- (from WEL_SYSTEM_METRICS)

	icon_spacing_width: INTEGER_32
			-- Width of rectangular cell that Program Manager
			-- uses to position tiled icons
			-- (from WEL_SYSTEM_METRICS)

	icon_width: INTEGER_32
			-- Width of an icon
			-- (from WEL_SYSTEM_METRICS)

	imm_enabled: BOOLEAN
			-- Is the IMM enabled (works only for Windows 2000 and
			-- and Asian locale machines (Chinese, Japanese, Korean))
			-- (from WEL_SYSTEM_METRICS)

	index_from_position (an_x_position, a_y_position: INTEGER_32): INTEGER_32
			-- Index of character closest to position `x_position`, `y_position`.
		require -- from EV_RICH_TEXT_I
			position_valid: an_x_position >= 0 and an_x_position <= width and a_y_position >= 0 and a_y_position <= height
		ensure -- from EV_RICH_TEXT_I
			index_valid: Result >= 1 and Result <= text_length
			text_not_changed: text.is_equal (old text)
			caret_not_moved: caret_position = old caret_position
			selection_not_changed: old has_selection = has_selection and has_selection implies old start_selection = start_selection and old end_selection = end_selection

	initialize_for_loading
			-- Initialize Current for load operations, by performing
			-- optimizations that prevent the control from slowing down due to
			-- unecessary optimizations.

	initialize_for_saving
			-- Initialize Current for save operations, by performing
			-- optimizations that prevent the control from slowing down due to
			-- unecessary optimizations.
		require -- from  EV_RICH_TEXT_I
			True
		require -- from  EV_RICH_TEXT_BUFFERING_STRUCTURES_I
			True

	internal_character_format (pos: INTEGER_32): EV_CHARACTER_FORMAT_I
			-- Result is character format at position pos. On some platforms
			-- this may be optimized to take the selected character format and therefore
			-- should only be used by `next_change_of_character`.
		require -- from EV_RICH_TEXT_I
			valid_character_index: pos >= 1 and pos <= text_length + 1
		ensure -- from EV_RICH_TEXT_I
			result_not_void: Result /= Void

	internal_character_format_contiguous (start_index, end_index: INTEGER_32): BOOLEAN
			-- Is formatting from caret position start_index to end_index contiguous?
			-- Internal version which permits optimizations as caret position and selection
			-- does not need to be restored.
		require -- from EV_RICH_TEXT_I
			valid_character_index: start_index >= 1 and end_index <= text_length + 1 and start_index <= end_index

	internal_non_sensitive: BOOLEAN
			-- Is Current not sensitive to input as seen
			-- from `interface`?
			-- (from EV_SENSITIVE_I)

	internal_paragraph_format (caret_index: INTEGER_32): EV_PARAGRAPH_FORMAT
			-- Result is paragraph_format at caret position caret_index.
		require -- from EV_RICH_TEXT_I
			valid_character_index: caret_index >= 1 and caret_index <= text_length + 1
		ensure -- from EV_RICH_TEXT_I
			result_not_void: Result /= Void

	internal_paragraph_format_contiguous (start_position, end_position: INTEGER_32): BOOLEAN
			-- Is paragraph formatting from caret_position start_position to end_position contiguous?
		require -- from EV_RICH_TEXT_I
			valid_character_index: start_position >= 1 and end_position <= text_length + 1 and start_position <= end_position

	internal_selected_character_format: EV_CHARACTER_FORMAT
			-- Implementation for `selected_character_format`. No preconditions permit
			-- calling even when there is no selection as required by some implementation
			-- features.
		ensure
			result_not_void: Result /= Void

	internal_selected_character_format_i: EV_CHARACTER_FORMAT_IMP
			-- Implementation for `selected_character_format`. No preconditions permit
			-- calling even when there is no selection as required by some implementation
			-- features.
		ensure
			result_not_void: Result /= Void

	internal_selected_paragraph_format: EV_PARAGRAPH_FORMAT
			-- Implementation for `selected_paragraph_format`. No preconditions permit
			-- calling even when there is no selection as required by some implementation
			-- features.
		ensure
			result_not_void: Result /= Void

	is_destroyed: BOOLEAN
			-- Is Current no longer usable?
			-- (from EV_ANY_I)

	is_editable: BOOLEAN
			-- Is text editable?
			-- (from EV_TEXT_COMPONENT_IMP)
		require -- from  EV_TEXT_COMPONENT_I
			True

	is_inside: BOOLEAN
			-- Is the current window inside another window?
			-- (from WEL_WINDOW)
		require -- from WEL_WINDOW
			exists: exists

	is_remote_session: BOOLEAN
			-- Is current applications displayed using remote desktop?
			-- (from WEL_SYSTEM_METRICS)

	is_replacing_nl_by_crnl: BOOLEAN
			-- Does current text control converts %N into %R%N?
		require -- from  EV_TEXT_COMPONENT_IMP
			True

	is_show_requested: BOOLEAN
			-- Is Current displayed in its parent?
			-- (from EV_WIDGET_IMP)
		require -- from  EV_WIDGET_I
			True
		require -- from EV_SIZEABLE_IMP
			not_is_destroyed: not is_destroyed

	is_terminal_service: BOOLEAN
			-- If window in terminal service (Remote Desktop)?
			-- (from WEL_WINDOWS_ROUTINES)
		require -- from WEL_WINDOWS_ROUTINES
			after_2000: (create {WEL_WINDOWS_VERSION} end).is_windows_2000_compatible

	is_transport_enabled: BOOLEAN
			-- Is the transport mechanism enabled?
			-- (from EV_PICK_AND_DROPABLE_I)

	is_window (hwnd: POINTER): BOOLEAN
			-- Does hwnd point to a valid Window?
			-- (from WEL_WINDOWS_ROUTINES)

	kanji_window_height: INTEGER_32
			-- Height of the Kanji window at the bottom of the
			-- screen. For double-byte character set versions of
			-- Windows only.
			-- (from WEL_SYSTEM_METRICS)

	key_down (virtual_key: INTEGER_32): BOOLEAN
			--Is 'virtual' key pressed
			-- (from WEL_WINDOWS_ROUTINES)

	key_locked (virtual_key: INTEGER_32): BOOLEAN
			--Is 'virtual' key locked
			-- (from WEL_WINDOWS_ROUTINES)

	key_to_string (key_data: INTEGER_32): STRING_32
			-- Give the string associated with the key given by
			-- virtual_key.
			-- (from WEL_WINDOWS_ROUTINES)

	last_position_from_line_number (a_line: INTEGER_32): INTEGER_32
			-- Position of the last character on the i-th line.
		require -- from EV_TEXT_I
			valid_line: valid_line_index (a_line)
		ensure -- from EV_TEXT_I
			valid_caret_position: valid_caret_position (a_line)

	wel_line (i: INTEGER_32): STRING_32
			-- ith line
			-- (from WEL_MULTIPLE_LINE_EDIT)
		require -- from WEL_MULTIPLE_LINE_EDIT
			exists: exists
			i_large_enough: i >= 0
			i_small_enough: i < wel_line_count
		ensure -- from WEL_MULTIPLE_LINE_EDIT
			result_exists: Result /= Void

	wel_line_count: INTEGER_32
			-- Number of lines
			-- (from WEL_MULTIPLE_LINE_EDIT)
		require -- from WEL_MULTIPLE_LINE_EDIT
			exists: exists
		ensure -- from WEL_MULTIPLE_LINE_EDIT
			positive_result: Result >= 0

	line_from_char (i: INTEGER_32): INTEGER_32
			-- Index of the line that contains the character
			-- index i. A character index is the number of
			-- characters from the beginning of the edit control.
			-- (from WEL_MULTIPLE_LINE_EDIT)
		require -- from WEL_MULTIPLE_LINE_EDIT
			exists: exists
		ensure -- from WEL_MULTIPLE_LINE_EDIT
			positive_result: Result >= 0

	line_index (i: INTEGER_32): INTEGER_32
			-- Number of characters from the beginning of the edit
			-- control to the zero-based line i.
			-- Retrieve a character index for a given line number.
			-- (from WEL_MULTIPLE_LINE_EDIT)
		require -- from WEL_MULTIPLE_LINE_EDIT
			exists: exists
			i_large_enough: i >= 0
			i_small_enough: i < wel_line_count
		ensure -- from WEL_MULTIPLE_LINE_EDIT
			positive_result: Result >= 0

	wel_line_index (i: INTEGER_32): INTEGER_32
			-- Number of characters from the beginning of the edit
			-- control to the zero-based line i.
			-- Retrieve a character index for a given line number.
			-- (from WEL_MULTIPLE_LINE_EDIT)
		require -- from WEL_MULTIPLE_LINE_EDIT
			exists: exists
			i_large_enough: i >= 0
			i_small_enough: i < wel_line_count
		ensure -- from WEL_MULTIPLE_LINE_EDIT
			positive_result: Result >= 0

	line_length (i: INTEGER_32): INTEGER_32
			-- Length of the ith line
			-- (from WEL_MULTIPLE_LINE_EDIT)
		require -- from WEL_MULTIPLE_LINE_EDIT
			exists: exists
			i_large_enough: i >= 0
			i_small_enough: i < wel_line_count
		ensure -- from WEL_MULTIPLE_LINE_EDIT
			positive_result: Result >= 0
			result_ok: Result = wel_line (i).count

	wel_line_number_from_position (a_pos: INTEGER_32): INTEGER_32
			-- Retrieves the line number from a character position.
			-- Line numbers start at 0.
			-- (from WEL_RICH_EDIT)
		require -- from WEL_RICH_EDIT
			exists: exists
			a_pos_large_enough: a_pos >= 0

	line_number_from_position (i: INTEGER_32): INTEGER_32
			-- Line containing caret position i.
		require -- from EV_TEXT_I
			valid_caret_position: valid_caret_position (i)
		ensure -- from EV_TEXT_I
			valid_line_number: Result >= 1 and Result <= line_count

	Managed: BOOLEAN = True
			-- All widgets are managed.
			-- (from EV_WIDGET_IMP)

	maximal_height: INTEGER_32
			-- Maximal height allowed for the window
			-- (from WEL_WINDOW)
		ensure -- from WEL_WINDOW
			result_large_enough: Result >= minimal_height

	maximal_width: INTEGER_32
			-- Maximal width allowed for the window
			-- (from WEL_WINDOW)
		ensure -- from WEL_WINDOW
			result_large_enough: Result >= minimal_width

	maximized: BOOLEAN
			-- Is the window maximized?
			-- (from WEL_WINDOW)
		require -- from WEL_WINDOW
			exists: exists

	maximized_window_height: INTEGER_32
			-- Height of a maximized window
			-- (from WEL_SYSTEM_METRICS)

	maximized_window_width: INTEGER_32
			-- Width of a maximized window
			-- (from WEL_SYSTEM_METRICS)

	menu_bar_height: INTEGER_32
			-- Height of single-line menu bar
			-- (from WEL_SYSTEM_METRICS)

	minimal_height: INTEGER_32
			-- Minimal height allowed for the window
			-- Zero by default.
			-- (from WEL_WINDOW)
		ensure -- from WEL_WINDOW
			positive_result: Result >= 0
			result_small_enough: Result <= maximal_height

	minimal_width: INTEGER_32
			-- Minimal width allowed for the window
			-- Zero by default.
			-- (from WEL_WINDOW)
		ensure -- from WEL_WINDOW
			positive_result: Result >= 0
			result_small_enough: Result <= maximal_width

	minimized: BOOLEAN
			-- Is the window minimized?
			-- (from WEL_WINDOW)
		require -- from WEL_WINDOW
			exists: exists

	mode_is_configurable_target_menu: BOOLEAN
			-- Is the transport mechanism a configurable target menu?
			-- (from EV_PICK_AND_DROPABLE_I)

	mode_is_drag_and_drop: BOOLEAN
			-- Is the transport mechanism drag and drop?
			-- (from EV_PICK_AND_DROPABLE_I)

	mode_is_pick_and_drop: BOOLEAN
			-- Is the transport mechanism pick and drop?
			-- (from EV_PICK_AND_DROPABLE_I)

	mode_is_target_menu: BOOLEAN
			-- Is the transport mechanism a target menu?
			-- (from EV_PICK_AND_DROPABLE_I)

	modified: BOOLEAN
			-- Has the text been modified?
			-- (from WEL_EDIT)
		require -- from WEL_EDIT
			exists: exists

	monitor_count: INTEGER_32
			-- Number of monitors used for displaying virtual screen.
			-- (from WEL_SYSTEM_METRICS)

	mouse_button_swapped: BOOLEAN
			-- Are the meanings of the left and right mouse
			-- buttons swapped?
			-- (from WEL_SYSTEM_METRICS)

	mouse_installed: BOOLEAN
			-- Is a mouse installed?
			-- (from WEL_SYSTEM_METRICS)

	options: INTEGER_32
			-- Give the current set of options.
			-- (from WEL_RICH_EDIT)

	paragraph_format (caret_index: INTEGER_32): EV_PARAGRAPH_FORMAT
			-- Result is paragraph_format at caret position caret_index.
		require -- from EV_RICH_TEXT_I
			valid_character_index: caret_index >= 1 and caret_index <= text_length + 1
		ensure -- from EV_RICH_TEXT_I
			result_not_void: Result /= Void
			text_not_changed: text.is_equal (old text)
			caret_not_moved: caret_position = old caret_position
			selection_not_changed: old has_selection = has_selection and has_selection implies old start_selection = start_selection and old end_selection = end_selection

	paragraph_format_contiguous (start_position, end_position: INTEGER_32): BOOLEAN
			-- Is paragraph formatting from caret_position start_position to end_position contiguous?
		require -- from EV_RICH_TEXT_I
			valid_character_index: start_position >= 1 and end_position <= text_length + 1 and start_position <= end_position
		ensure -- from EV_RICH_TEXT_I
			text_not_changed: text.is_equal (old text)
			caret_not_moved: caret_position = old caret_position
			selection_not_changed: old has_selection = has_selection and has_selection implies old start_selection = start_selection and old end_selection = end_selection

	paragraph_format_range_information (start_position, end_position: INTEGER_32): EV_PARAGRAPH_FORMAT_RANGE_INFORMATION
			-- Formatting range information from caret position start_position to end_position.
			-- All attributes in Result are set to True if they remain consitent from start_position to
			--end_position and False otherwise.
			-- Result is a snapshot of Current, and does not remain consistent as the contents
			-- are subsequently changed.
		require -- from EV_RICH_TEXT_I
			valid_character_index: start_position >= 1 and end_position <= text_length + 1 and start_position <= end_position
		ensure -- from EV_RICH_TEXT_I
			result_not_void: Result /= Void
			text_not_changed: text.is_equal (old text)
			caret_not_moved: caret_position = old caret_position
			selection_not_changed: old has_selection = has_selection and has_selection implies old start_selection = start_selection and old end_selection = end_selection

	pen_installed: BOOLEAN
			-- Is a pen installed?
			-- (from WEL_SYSTEM_METRICS)

	placement: WEL_WINDOW_PLACEMENT
			-- Window placement information
			-- (from WEL_WINDOW)
		require -- from WEL_WINDOW
			exists: exists
		ensure -- from WEL_WINDOW
			result_not_void: Result /= Void

	popup_menu_right_aligned: BOOLEAN
			-- Are pop-up menus right-aligned relative to the
			-- corresponding menu-bar item?
			-- (from WEL_SYSTEM_METRICS)

	position_from_character_index (character_index: INTEGER_32): WEL_POINT
			-- Coordinates of a character at character_index in
			-- the client area.
			-- A returned coordinate can be negative if the
			-- character has been scrolled outside the edit
			-- control's client area.
			-- The coordinates are truncated to integer values and
			-- are in screen units relative to the upper-left
			-- corner of the client area of the control.
			-- (from WEL_RICH_EDIT)
		require -- from WEL_RICH_EDIT
			exists: exists
			index_large_enough: character_index >= 0
			index_small_enough: character_index <= wel_text_length + 2
		ensure -- from WEL_RICH_EDIT
			result_not_void: Result /= Void

	position_from_index (an_index: INTEGER_32): EV_COORDINATE
			-- Position of character at index an_index.
		require -- from EV_RICH_TEXT_I
			index_valid: an_index >= 1 and an_index <= text_length
			character_displayed: character_displayed (an_index)
		ensure -- from EV_RICH_TEXT_I
			position_valid: Result.x >= 0 and Result.x <= width and Result.y >= 0 and Result.y <= height
			text_not_changed: text.is_equal (old text)
			caret_not_moved: caret_position = old caret_position
			selection_not_changed: old has_selection = has_selection and has_selection implies old start_selection = start_selection and old end_selection = end_selection

	read_only: BOOLEAN
			-- Is the current edit control read-only?
			-- (from WEL_EDIT)
		require -- from  EV_TEXT_COMPONENT_IMP
			True
		require -- from WEL_EDIT
			exists: exists

	same_type (other: ANY): BOOLEAN
			-- Is type of current object identical to type of other?
			-- (from ANY)
		require -- from ANY
			other_not_void: other /= Void
		ensure -- from ANY
			definition: Result = (conforms_to (other) and other.conforms_to (Current))

	screen_height: INTEGER_32
			-- Screen height
			-- (from WEL_SYSTEM_METRICS)

	screen_width: INTEGER_32
			-- Screen width
			-- (from WEL_SYSTEM_METRICS)

	scroll_caret_at_selection: BOOLEAN
			-- Will the caret be scrolled at the selection after
			-- a call to `set_selection`?
			-- (from WEL_EDIT)

	selected_character_format: EV_CHARACTER_FORMAT
			-- Result is character format of current selection.
			-- If more than one format is contained in the selection, Result
			-- is the first of these formats.
		require -- from EV_RICH_TEXT_I
			has_selection: has_selection
		ensure -- from EV_RICH_TEXT_I
			result_not_void: Result /= Void
			text_not_changed: text.is_equal (old text)
			caret_not_moved: caret_position = old caret_position
			selection_not_changed: old has_selection = has_selection and has_selection implies old start_selection = start_selection and old end_selection = end_selection

	selected_paragraph_format: EV_PARAGRAPH_FORMAT
			-- Result is paragraph format of current selection.
			-- If more than one format is contained in the selection, Result
			-- is the first of these formats.
		require -- from EV_RICH_TEXT_I
			has_selection: has_selection
		ensure -- from EV_RICH_TEXT_I
			result_not_void: Result /= Void
			text_not_changed: text.is_equal (old text)
			caret_not_moved: caret_position = old caret_position
			selection_not_changed: old has_selection = has_selection and has_selection implies old start_selection = start_selection and old end_selection = end_selection

	selected_text: STRING_32
			-- Text currently selected in Current.
		require -- from  EV_TEXT_COMPONENT_I
			True
		require -- from WEL_RICH_EDIT
			exists: exists
		ensure -- from WEL_RICH_EDIT
			selected_text_not_void: Result /= Void
			valid_length: (create {UTF_CONVERTER} end).utf_16_bytes_count (Result, 1, Result.count) // 2 = (wel_selection_end - wel_selection_start)

	selection: WEL_CHARACTER_RANGE
			-- Structure which contains the starting and ending
			-- character positions of the selection.
			-- (from WEL_RICH_EDIT)
		require -- from WEL_RICH_EDIT
			exists: exists

	wel_selection_end: INTEGER_32
			-- Index of the last character selected
			-- (from WEL_RICH_EDIT)
		require -- from EV_TEXT_COMPONENT_IMP
			exists: exists
		require -- from WEL_EDIT
			exists: exists
		ensure -- from WEL_EDIT
			result_large_enough: Result >= 0
			result_small_enough: Result <= wel_text_length

	wel_selection_start: INTEGER_32
			-- Index of the first character selected
			-- (from WEL_RICH_EDIT)
		require -- from EV_TEXT_COMPONENT_IMP
			exists: exists
		require -- from WEL_EDIT
			exists: exists
		ensure -- from WEL_EDIT
			result_large_enough: Result >= 0
			result_small_enough: Result <= wel_text_length

	shared: BOOLEAN
			-- Is item shared by another object?
			-- If False (by default), item will
			-- be destroyed by `destroy_item`.
			-- If True, item will not be destroyed.
			-- (from WEL_ANY)

	shown: BOOLEAN
			-- Is the window shown?
			-- (from WEL_WINDOW)
		require -- from WEL_WINDOW
			exists: exists

	is_displayed: BOOLEAN
			-- Is the window shown?
			-- (from WEL_WINDOW)
		require -- from  EV_WIDGET_I
			True
		require -- from EV_SIZEABLE_IMP
			not_is_destroyed: not is_destroyed
		require -- from WEL_WINDOW
			exists: exists

	start_selection: INTEGER_32
			-- Caret position of the start of selected text if any,
			-- otherwise `caret_position`.
			-- (from EV_TEXT_COMPONENT_IMP)
		require -- from  EV_TEXT_COMPONENT_I
			True
		ensure -- from EV_TEXT_COMPONENT_I
			result_large_enough: Result >= 1
			result_small_enough: Result <= text_length + 1
			consistent_with_selection_start: Result >= start_selection

	style: INTEGER_32
			-- Window style
			-- (from WEL_WINDOW)
		require -- from  EV_WIDGET_IMP
			True
		require -- from WEL_WINDOW
			exists: exists

	system_directory: STRING_32
			-- Path of the Windows system directory
			-- (from WEL_WINDOWS_ROUTINES)
		ensure -- from WEL_WINDOWS_ROUTINES
			result_not_void: Result /= Void

	tab_positions: EV_ACTIVE_LIST [INTEGER_32]
			-- Width of each tab position in pixels, from left to right.
			-- All tab positions not included use `tab_width`.
			-- (from EV_RICH_TEXT_I)

	tab_width: INTEGER_32
			-- Default width in pixels of each tab in Current.

	text: STRING_32
			-- text of Current.
		require -- from  EV_TEXTABLE_I
			True
		ensure -- from EV_TEXTABLE_I
			not_void: Result /= Void
			cloned: Result /= text

	wel_text: STRING_32
			-- Contents of the rich edit control
			-- (from WEL_RICH_EDIT)
		require -- from WEL_WINDOW
			exists: exists
		ensure -- from WEL_WINDOW
			result_not_void: Result /= Void

	text_at (i: INTEGER_32; n: INTEGER_32): STRING_32
			-- Text of length n at position i.
			-- (from WEL_RICH_EDIT)
		require -- from WEL_RICH_EDIT
			exists: exists
			valid_length: n > 0
			valid_index: wel_text.valid_index (i + 1)
			valid_length: wel_text.valid_index (i + n)

	wel_text_length: INTEGER_32
			-- Text length
			-- (from WEL_WINDOW)
		require -- from EV_TEXT_COMPONENT_IMP
			exists: exists
		require -- from WEL_WINDOW
			exists: exists
		ensure -- from WEL_WINDOW
			positive_result: Result >= 0

	wel_text_substring (nb: INTEGER_32): WEL_STRING
			-- nb code units of `text` retrieved as a string.
			-- (from WEL_RICH_EDIT)
		require -- from EV_TEXT_COMPONENT_IMP
			exists: exists
		require -- from WEL_WINDOW
			exists: exists
			valid_upper_bound: nb <= wel_text_length

	tick_count: INTEGER_32
			-- Number of milliseconds that have
			-- elapsed since Windows was started.
			-- (from WEL_WINDOWS_ROUTINES)
		ensure -- from WEL_WINDOWS_ROUTINES
			positive_result: Result >= 0

	title_bar_height: INTEGER_32
			-- Height of title bar.
			-- (from WEL_SYSTEM_METRICS)

	title_bar_image_height: INTEGER_32
			-- Height of bitmap contained in title bar.
			-- (from WEL_SYSTEM_METRICS)

	title_bar_image_width: INTEGER_32
			-- Width of bitmap contained in title bar.
			-- (from WEL_SYSTEM_METRICS)

	user_is_sensitive: BOOLEAN
			-- Is the object sensitive to user input.
			-- (from EV_SENSITIVE_I)

	valid_caret_position (pos: INTEGER_32): BOOLEAN
			-- Is pos a valid position for the caret?
			-- (from EV_TEXT_COMPONENT_I)

	valid_color_constant (c: INTEGER_32): BOOLEAN
			-- Is c a valid color constant?
			-- (from WEL_COLOR_CONSTANTS)

	valid_hwnd_constant (c: POINTER): BOOLEAN
			-- Is c a valid hwnd constant?
			-- (from WEL_HWND_CONSTANTS)

	vertical_scroll_bar_arrow_height: INTEGER_32
			-- Height of arrow bitmap on vertical scrollbar
			-- (from WEL_SYSTEM_METRICS)

	vertical_scroll_bar_arrow_width: INTEGER_32
			-- Width of arrow bitmap on vertical scrollbar
			-- (from WEL_SYSTEM_METRICS)

	vertical_scroll_bar_thumb_height: INTEGER_32
			-- Height of vertical scrollbar thumb
			-- (from WEL_SYSTEM_METRICS)

	virtual_screen_height: INTEGER_32
			-- Screen height
			-- (from WEL_SYSTEM_METRICS)

	virtual_screen_width: INTEGER_32
			-- Screen width
			-- (from WEL_SYSTEM_METRICS)

	virtual_screen_x: INTEGER_32
			-- Screen width
			-- (from WEL_SYSTEM_METRICS)

	virtual_screen_y: INTEGER_32
			-- Screen height
			-- (from WEL_SYSTEM_METRICS)

	wel_width: INTEGER_32
			-- Window width
			-- (from WEL_WINDOW)
		require -- from EV_SIZEABLE_IMP
			not_is_destroyed: not is_destroyed
		require -- from WEL_WINDOW
			exists: exists

	window_border_height: INTEGER_32
			-- Height of the border of a window
			-- (from WEL_SYSTEM_METRICS)

	window_border_width: INTEGER_32
			-- Width of the border of a window
			-- (from WEL_SYSTEM_METRICS)

	window_captured: BOOLEAN
			-- Has a window been captured?
			-- (from WEL_WINDOW)

	window_frame_height: INTEGER_32
			-- Height of window frame for a window
			-- that can be resized
			-- (from WEL_SYSTEM_METRICS)

	window_frame_width: INTEGER_32
			-- Width of window frame for a window
			-- that can be resized
			-- (from WEL_SYSTEM_METRICS)

	window_minimum_height: INTEGER_32
			-- Minimum height of a window
			-- (from WEL_SYSTEM_METRICS)

	window_minimum_width: INTEGER_32
			-- Minimum width of a window
			-- (from WEL_SYSTEM_METRICS)

	window_of_item (hwnd: POINTER): detachable WEL_WINDOW
			-- Retrieve Eiffel object associated with hwnd pointer.
			-- (from WEL_WINDOWS_ROUTINES)
		require -- from WEL_WINDOWS_ROUTINES
			hwnd_not_null: hwnd /= default_pointer
			is_window_pointer: is_window (hwnd)
		ensure -- from WEL_WINDOWS_ROUTINES
			is_wel_window: Result /= Void end implies (create {INTERNAL} end).type_conforms_to ((create {INTERNAL} end).dynamic_type (Result), (create {INTERNAL} end).dynamic_type_from_string ("WEL_WINDOW"))
			is_proper_wel_window: Result /= Void implies Result.item = hwnd

	window_rect: WEL_RECT
			-- Window rectangle (absolute position)
			-- (from WEL_WINDOW)
		require -- from  EV_WIDGET_IMP
			True
		require -- from WEL_WINDOW
			exists: exists
		ensure -- from WEL_WINDOW
			result_not_void: Result /= Void

	windows_directory: STRING_32
			-- Path of the Windows directory
			-- (from WEL_WINDOWS_ROUTINES)
		ensure -- from WEL_WINDOWS_ROUTINES
			result_not_void: Result /= Void

	x: INTEGER_32
			-- Window x position
			-- (from WEL_WINDOW)
		require -- from WEL_WINDOW
			exists: exists
		ensure -- from WEL_WINDOW
			wel_parent = Void implies Result = absolute_x

	y: INTEGER_32
			-- Window y position
			-- (from WEL_WINDOW)
		require -- from WEL_WINDOW
			exists: exists
		ensure -- from WEL_WINDOW
			wel_parent = Void implies Result = absolute_y
	
feature -- Status setting

	buffered_append (a_text: READABLE_STRING_GENERAL; format: EV_CHARACTER_FORMAT)
			-- Append a_text with format format to append buffer.
			-- To render buffer to Current, call `flush_buffer` which replaces current content,
			-- or `flush_buffer_to` which inserts the formatted text.
			-- format is not cloned internally and when buffer is flushed, its reference is
			-- used. Therefore, you must not modify format externally after passing to
			-- this procedure, otherwise all buffered appends that referenced the same format object
			-- will use its current value.
		require -- from EV_RICH_TEXT_I
			a_text_not_void: a_text /= Void
			format_not_void: format /= Void
			buffer_not_locked_for_format: not buffer_locked_in_format_mode
		ensure -- from EV_RICH_TEXT_I
			text_not_changed: text.is_equal (old text)
			buffer_locked_for_append: buffer_locked_in_append_mode
			caret_not_moved: caret_position = old caret_position
			selection_not_changed: old has_selection = has_selection and has_selection implies old start_selection = start_selection and old end_selection = end_selection

	buffered_format (start_pos, end_pos: INTEGER_32; format: EV_CHARACTER_FORMAT)
			-- Apply a character format format from caret positions start_position to end_position to
			-- format buffer. Call `flush_buffer` to apply buffered contents to Current.
			-- format is not cloned internally and when buffer is flushed, its reference is
			-- used. Therefore, you must not modify format externally after passing to
			-- this procedure, otherwise all buffered appends that referenced the same format object
			-- will use its current value.
		require -- from EV_RICH_TEXT_I
			valid_positions: start_pos <= end_pos and start_pos >= 1 and end_pos <= text_length + 1
			format_not_void: format /= Void
		ensure -- from EV_RICH_TEXT_I
			text_not_changed: text.is_equal (old text)
			buffer_locked_for_format: buffer_locked_in_format_mode
			caret_not_moved: caret_position = old caret_position
			selection_not_changed: old has_selection = has_selection and has_selection implies old start_selection = start_selection and old end_selection = end_selection

	check_drag_and_drop_release (a_x, a_y: INTEGER_32)
			-- End transport if in drag and drop.
			-- (from EV_PICK_AND_DROPABLE_IMP)

	check_dragable_release (a_x, a_y: INTEGER_32)
			-- End transport if in drag and drop.
			-- (from EV_DOCKABLE_SOURCE_IMP)

	disable_capture
			-- Release all user events.
			-- (from EV_WIDGET_IMP)
		require -- from  EV_PICK_AND_DROPABLE_I
			True
		require -- from  EV_DOCKABLE_SOURCE_IMP
			True

	disable_commands
			-- Disable commands execution.
			-- (from WEL_WINDOW)
		ensure -- from WEL_WINDOW
			commands_disabled: not commands_enabled

	disable_default_processing
			-- Disable default window processing.
			-- The standard window procedure will not be called for
			-- each messages received by the window and then the
			-- normal behavior will not occur.
			-- (from WEL_WINDOW)
		require -- from  EV_WIDGET_IMP
			True
		ensure -- from WEL_WINDOW
			default_processing_disabled: not default_processing

	disable_dockable
			-- Ensure Current is not dockable
			-- (from EV_DOCKABLE_SOURCE_I)
		ensure -- from EV_DOCKABLE_SOURCE_I
			not_is_dockable: not is_dockable

	disable_drag_accept_files
			-- Disallow Current from being a file drag and drop target.
			-- (from WEL_WINDOW)
		require -- from  EV_WIDGET_IMP
			True
		require -- from WEL_WINDOW
			exists

	disable_external_docking
			-- Forbid Current to be docked into an EV_DOCKABLE_DIALOG
			-- When there is no valid EV_DRAGABLE_TARGET upon completion
			-- of the transport?
			-- (from EV_DOCKABLE_SOURCE_I)
		require -- from EV_DOCKABLE_SOURCE_I
			is_dockable: is_dockable
		ensure -- from EV_DOCKABLE_SOURCE_I
			not_externally_dockable: not is_external_docking_enabled

	disable_external_docking_relative
			-- Assign False to `is_external_docking_relative`, ensuring that
			-- a dockable dialog displayed when Current is docked externally
			-- is displayed as a standard window.
			-- (from EV_DOCKABLE_SOURCE_I)
		require -- from EV_DOCKABLE_SOURCE_I
			external_docking_enabled: is_external_docking_enabled
		ensure -- from EV_DOCKABLE_SOURCE_I
			external_docking_not_relative: not is_external_docking_relative

	disable_notifications
			-- Disable all notifications.
			-- (from WEL_RICH_EDIT)
		require -- from WEL_RICH_EDIT
			exists: exists
		ensure -- from WEL_RICH_EDIT
			no_notification: event_mask = Enm_none

	disable_pebble_positioning
			-- Assign False to `pebble_positioning_enabled`.
			-- (from EV_PICK_AND_DROPABLE_I)

	disable_scroll_caret_at_selection
			-- Set `scroll_caret_at_selection` to False.
			-- The caret will not be scrolled at the selection
			-- after a call to `set_selection`.
			-- (from WEL_EDIT)
		require -- from WEL_EDIT
			exists: exists
		ensure -- from WEL_EDIT
			scroll_caret_at_selection_disabled: not scroll_caret_at_selection

	disable_sensitive
			-- Set Current to insensitive mode.
			-- This means that any events with an
			-- event type of KeyPress, KeyRelease,
			-- ButtonPress, ButtonRelease, MotionNotify,
			-- EnterNotify, LeaveNotify, FocusIn or
			-- FocusOut will not be dispatched to current
			-- widget and to all its children.  Set it to
			-- sensitive mode otherwise.
			-- (from EV_WIDGET_IMP)
		require -- from  EV_SENSITIVE_I
			True

	disable_transport
			-- Deactivate pick/drag and drop mechanism.
			-- (from EV_PICK_AND_DROPABLE_IMP)
		require -- from  EV_PICK_AND_DROPABLE_I
			True
		ensure -- from EV_PICK_AND_DROPABLE_I
			is_transport_disabled: not is_transport_enabled

	disable_word_wrapping
			-- Ensure has_word_wrap is False.
		require -- from  EV_TEXT_I
			True
		ensure -- from EV_TEXT_I
			word_wrapping_disabled: not has_word_wrapping

	dragable_motion (a_x, a_y, a_screen_x, a_screen_y: INTEGER_32)
			-- If in drag/pick and drop then update.
			-- (from EV_DOCKABLE_SOURCE_IMP)

	dragable_press (a_x, a_y, a_button, a_screen_x, a_screen_y: INTEGER_32)
			-- Process a_button to start/stop the drag/pick and
			-- drop mechanism.
			-- (from EV_DOCKABLE_SOURCE_IMP)

	enable_all_notifications
			-- Enable all notifications.
			-- (from WEL_RICH_EDIT)
		require -- from WEL_RICH_EDIT
			exists: exists

	enable_capture
			-- Enable capture.
			-- (from EV_WIDGET_IMP)
		require -- from  EV_PICK_AND_DROPABLE_I
			True

	enable_commands
			-- Enable commands execution.
			-- (from WEL_WINDOW)
		ensure -- from WEL_WINDOW
			commands_enabled: commands_enabled

	enable_default_processing
			-- Enable default window processing.
			-- The standard window procedure will be called for
			-- each messages received by the window and then the
			-- normal behavior will occur.
			-- (from WEL_WINDOW)
		ensure -- from WEL_WINDOW
			default_processing_enabled: default_processing

	enable_dockable
			-- Allow Current to be dockable
			-- (from EV_DOCKABLE_SOURCE_I)
		ensure -- from EV_DOCKABLE_SOURCE_I
			is_dockable: is_dockable

	enable_drag_accept_files
			-- Allow Current to be a file drag and drop target.
			-- (from WEL_WINDOW)
		require -- from  EV_WIDGET_IMP
			True
		require -- from WEL_WINDOW
			exists

	enable_external_docking
			-- Allow Current to be docked into an EV_DOCKABLE_DIALOG
			-- When there is no valid EV_DRAGABLE_TARGET upon completion
			-- of the transport?
			-- (from EV_DOCKABLE_SOURCE_I)
		require -- from EV_DOCKABLE_SOURCE_I
			is_dockable: is_dockable
		ensure -- from EV_DOCKABLE_SOURCE_I
			is_externally_dockable: is_external_docking_enabled

	enable_external_docking_relative
			-- Assign True to `is_external_docking_relative`, ensuring that
			-- a dockable dialog displayed when Current is docked externally
			-- is displayed relative to the top level window.
			-- (from EV_DOCKABLE_SOURCE_I)
		require -- from EV_DOCKABLE_SOURCE_I
			external_docking_enabled: is_external_docking_enabled
		ensure -- from EV_DOCKABLE_SOURCE_I
			external_docking_not_relative: is_external_docking_relative

	enable_pebble_positioning
			-- Assign True to `pebble_positioning_enabled`.
			-- (from EV_PICK_AND_DROPABLE_I)

	enable_scroll_caret_at_selection
			-- Set `scroll_caret_at_selection` to True.
			-- The caret will be scrolled at the selection after
			-- a call to `set_selection`.
			-- (from WEL_EDIT)
		require -- from WEL_EDIT
			exists: exists
		ensure -- from WEL_EDIT
			scroll_caret_at_selection_enabled: scroll_caret_at_selection

	enable_sensitive
			-- Set Current to sensitive mode.
			-- (from EV_WIDGET_IMP)
		require -- from  EV_SENSITIVE_I
			True

	enable_standard_notifications
			-- Enable the standard notifications.
			-- (Enm_change, Enm_update and Enm_scroll).
			-- (from WEL_RICH_EDIT)
		require -- from WEL_RICH_EDIT
			exists: exists

	enable_transport
			-- Activate pick/drag and drop mechanism.
			-- (from EV_PICK_AND_DROPABLE_IMP)
		require -- from EV_PICK_AND_DROPABLE_I
			pebble_not_void: pebble /= Void or pebble_function /= Void
		ensure -- from EV_PICK_AND_DROPABLE_I
			is_transport_enabled: is_transport_enabled

	enable_word_wrapping
			-- Ensure has_word_wrap is True.
		require -- from  EV_TEXT_I
			True
		ensure -- from EV_TEXT_I
			word_wrapping_enabled: has_word_wrapping

	escape_pnd
			-- Escape the pick and drop.
			-- (from EV_PICK_AND_DROPABLE_IMP)
		ensure -- from EV_PICK_AND_DROPABLE_IMP
			not_in_transport: not transport_executing

	flush_buffer
			-- Flush any buffered operations.
		ensure -- from EV_RICH_TEXT_I
			buffer_not_locked: not buffer_locked_in_append_mode and not buffer_locked_in_format_mode
			caret_consistent: (old buffer_locked_in_append_mode implies caret_position = 1) or old buffer_locked_in_format_mode implies (caret_position = old caret_position)
			unselected: not has_selection

	flush_buffer_to (start_position, end_position: INTEGER_32)
			-- Replace contents of current from caret position start_position to end_position with
			-- contents of buffer, since it was last flushed. If start_position and end_position
			-- are equal, insert the contents of the buffer at caret position start_position.
		require -- from EV_RICH_TEXT_I
			buffer_locked_for_append: buffer_locked_in_append_mode
			start_position >= 1 and end_position <= text_length + 1 and start_position <= end_position
		ensure -- from EV_RICH_TEXT_I
			buffer_locked_for_append: not buffer_locked_in_append_mode
			caret_consistent: old caret_position <= text_length + 1 implies caret_position = old caret_position
			unselected: not has_selection

	format_paragraph (start_position, end_position: INTEGER_32; format: EV_PARAGRAPH_FORMAT)
			-- Apply paragraph formatting format to caret positions start_position, end_position inclusive.
			-- Formatting applies to complete lines as separated by new line characters that start_position and
			-- end_position fall on.
		require -- from EV_RICH_TEXT_I
			valid_positions: start_position <= end_position and start_position >= 1 and end_position <= text_length + 1
			format_not_void: format /= Void
		ensure -- from EV_RICH_TEXT_I
			text_not_changed: text.is_equal (old text)
			caret_not_moved: caret_position = old caret_position
			selection_not_changed: old has_selection = has_selection and has_selection implies old start_selection = start_selection and old end_selection = end_selection

	format_region (start_position, end_position: INTEGER_32; format: EV_CHARACTER_FORMAT)
			-- Apply format to all characters between the caret positions start_position and end_position.
			-- Formatting is applied immediately.
		require -- from EV_RICH_TEXT_I
			valid_positions: start_position < end_position and start_position >= 1 and end_position <= text_length + 1
			format_not_void: format /= Void
		ensure -- from EV_RICH_TEXT_I
			text_not_changed: text.is_equal (old text)
			caret_not_moved: caret_position = old caret_position
			selection_not_changed: old has_selection = has_selection and has_selection implies old start_selection = start_selection and old end_selection = end_selection

	get_text_limit: INTEGER_32
			-- Get the maximum length of text that the user
			-- can enter into the edit control.
			-- (from WEL_EDIT)
		require -- from  EV_TEXT_COMPONENT_IMP
			True
		require -- from WEL_EDIT
			exists: exists
		ensure -- from WEL_EDIT
			positive_result: Result >= 0

	has_parent: BOOLEAN
			-- Is Current parented?
			-- (from EV_WIDGET_IMP)
		require -- from  EV_SENSITIVE_I
			True

	hide
			-- Hide Current.
			-- (from EV_WIDGET_IMP)
		require -- from  EV_WIDGET_I
			True
		require -- from WEL_WINDOW
			exists: exists
		ensure -- from WEL_WINDOW
			hidden: not is_displayed

	insert_rtf_stream_in (stream: WEL_RICH_EDIT_STREAM_IN)
			-- Start a rtf stream in operation with stream.
		require -- from WEL_RICH_EDIT
			exists: exists
			stream_not_void: stream /= Void
			stream_exists: stream.exists

	internal_actions_blocked: BOOLEAN
			-- Are caret position and selection change actions blocked internally due to an operation
			-- occurring that may affect them. They must be displayed during the implementation of
			-- certain features that require such modification as part of their implementation. See
			-- `safe_store_caret`, `safe_restore_caret`.

	internal_change_word_wrapping (word_wrapping: BOOLEAN)
			-- Enable word wrapping if word_wrapping, otherwise disable.
		ensure
			option_set: has_word_wrapping = word_wrapping

	maximize
			-- Maximize the window
			-- (from WEL_WINDOW)
		require -- from WEL_WINDOW
			exists: exists
		ensure -- from WEL_WINDOW
			maximized: maximized

	minimize
			-- Minimize the window and display its icon
			-- (from WEL_WINDOW)
		require -- from WEL_WINDOW
			exists: exists
		ensure -- from WEL_WINDOW
			minimized: minimized

	modify_paragraph (start_position, end_position: INTEGER_32; format: EV_PARAGRAPH_FORMAT; applicable_attributes: EV_PARAGRAPH_FORMAT_RANGE_INFORMATION)
			-- Modify paragraph formatting format from caret positions start_position to end_position inclusive.
			-- Formatting applies to complete lines as separated by new line characters that start_position and
			-- end_position fall on. All attributes of format that are set to True within applicable_attributes are applied.
		require -- from EV_RICH_TEXT_I
			applicable_attributes_not_void: applicable_attributes /= Void
			valid_positions: start_position <= end_position and start_position >= 1 and end_position <= text_length + 1
			format_not_void: format /= Void
		ensure -- from EV_RICH_TEXT_I
			text_not_changed: text.is_equal (old text)
			caret_not_moved: caret_position = old caret_position
			selection_not_changed: old has_selection = has_selection and has_selection implies old start_selection = start_selection and old end_selection = end_selection

	modify_region (start_position, end_position: INTEGER_32; format: EV_CHARACTER_FORMAT; applicable_attributes: EV_CHARACTER_FORMAT_RANGE_INFORMATION)
			-- Modify formatting from start_position to end_position applying all attributes of format that are set to
			-- True within applicable_attributes, ignoring others.
		require -- from EV_RICH_TEXT_I
			applicable_attributes_not_void: applicable_attributes /= Void
			valid_positions: start_position < end_position and start_position >= 1 and end_position <= text_length + 1
			format_not_void: format /= Void
		ensure -- from EV_RICH_TEXT_I
			text_not_changed: text.is_equal (old text)
			caret_not_moved: caret_position = old caret_position
			selection_not_changed: old has_selection = has_selection and has_selection implies old start_selection = start_selection and old end_selection = end_selection

	move_to_selection
			-- Move the selected text to be visible
			-- (from WEL_RICH_EDIT)

	must_restore_selection: BOOLEAN
			-- Must a selection be restored by `safe_restore_caret`?
			-- It is not just enough to check that there was originally a selection. For example, in the case
			-- where the En_selchange_message is received during an operation that will then call `safe_restore_caret`.
			-- As the selection may have changed from none to something between `safe_store_caret` and `safe_restore_caret`,
			-- it is flagged, so the selection can be set. To reproduce such dangerous behaviour, remove selection from the rich text,
			-- connect an event to the `selection_change_actions` that queries the character format (internally this manipulates the selection)
			-- and select using shift and left or right. Without this boolean being set from `on_en_selchange` the new selection would not
			-- be correctly shown in the control. Julian.

	original_caret_position: INTEGER_32
			-- Original position of caret before call to safe_store_caret', to be restored by `safe_restore_caret`.

	original_selection_end: INTEGER_32
			-- Original selection when `safe_store_caret` called.

	original_selection_start: INTEGER_32
			-- Original selection when `safe_store_caret` called.

	parent_is_sensitive: BOOLEAN
			-- Is parent of Current sensitive?
			-- (from EV_WIDGET_IMP)
		require -- from  EV_SENSITIVE_I
			True

	pnd_motion (a_x, a_y, a_screen_x, a_screen_y: INTEGER_32)
			-- If in drag/pick and drop then update.
			-- (from EV_PICK_AND_DROPABLE_IMP)

	pnd_press (a_x, a_y, a_button, a_screen_x, a_screen_y: INTEGER_32)
			-- Process a_button to start/stop the drag/pick and
			-- drop mechanism.
			-- (from EV_PICK_AND_DROPABLE_IMP)

	release_capture
			-- Release the mouse capture after a call
			-- to `set_capture`.
			-- (from WEL_WINDOW)
		require -- from  EV_PICK_AND_DROPABLE_IMP
			True
		require -- from  EV_DOCKABLE_SOURCE_IMP
			True
		require -- from WEL_WINDOW
			exists: exists
			has_capture: wel_has_capture
		ensure -- from WEL_WINDOW
			not_has_capture: not wel_has_capture

	remove_default_key_processing_handler
			-- Ensure `default_key_processing_handler` is Void.
			-- (from EV_WIDGET_I)
		ensure -- from EV_WIDGET_I
			default_key_processing_handler_removed: default_key_processing_handler = Void

	remove_pebble
			-- Remove `pebble`.
			-- (from EV_PICK_AND_DROPABLE_I)
		ensure -- from EV_PICK_AND_DROPABLE_I
			pebble_removed: pebble = Void and pebble_function = Void
			is_transport_disabled: not is_transport_enabled

	remove_real_source
			-- Ensure `real_source` is Void.
			-- (from EV_DOCKABLE_SOURCE_I)
		require -- from EV_DOCKABLE_SOURCE_I
			is_dockable: is_dockable
		ensure -- from EV_DOCKABLE_SOURCE_I
			real_source_void: real_source = Void

	remove_real_target
			-- Ensure `real_target` is Void.
			-- (from EV_WIDGET_I)
		ensure -- from EV_WIDGET_I
			real_target_void: real_target = Void

	reset_pebble_function
			-- Reset any values created by calling `pebble_function`.
			-- (from EV_PICK_AND_DROPABLE_I)
		ensure -- from EV_PICK_AND_DROPABLE_I
			pebble_function_preserved: pebble_function = old pebble_function
			pebble_without_function: pebble_function = Void implies (pebble = old pebble)
			pebble_with_function: pebble_function /= Void implies pebble = Void

	restore
			-- Restore the window to its
			-- original size and position after
			-- `minimize` or `maximize`
			-- (from WEL_WINDOW)
		require -- from WEL_WINDOW
			exists: exists

	rtf_stream_in (stream: WEL_RICH_EDIT_STREAM_IN)
			-- Start a rtf stream in operation with stream.
		require -- from WEL_RICH_EDIT
			exists: exists
			stream_not_void: stream /= Void
			stream_exists: stream.exists

	safe_restore_caret
			-- Restore caret position stored by last call to `safe_store_caret` and restore
			-- change events.

	safe_store_caret
			-- Store caret position, and block caret change events from occurring.

	scroll_to_end
			-- Scroll to end.
		require -- from  EV_TEXT_I
			True

	set_accept_cursor (a_cursor: like accept_cursor)
			-- Set a_cursor to be displayed when the screen pointer is over a
			-- target that accepts `pebble` during pick and drop.
			-- (from EV_PICK_AND_DROPABLE_I)

	set_actual_drop_target_agent (an_agent: like actual_drop_target_agent)
			-- Assign an_agent to `actual_drop_target_agent`.
			-- (from EV_WIDGET_I)
		require -- from EV_WIDGET_I
			an_agent_not_void: an_agent /= Void
		ensure -- from EV_WIDGET_I
			assigned: actual_drop_target_agent = an_agent

	wel_set_background_color (color: WEL_COLOR_REF)
			-- Set the background color with color.
			-- (from WEL_RICH_EDIT)
		require -- from WEL_RICH_EDIT
			exists: exists
			color_not_void: color /= Void

	set_background_color (color: EV_COLOR)
			-- Make color the new `background_color`
		require -- from EV_COLORIZABLE_I
			a_color_not_void: color /= Void
		ensure -- from EV_COLORIZABLE_I
			background_color_assigned: is_initialized implies background_color.is_equal (color)

	set_background_system_color
			-- Set the background color with the window
			-- background system color.
			-- (from WEL_RICH_EDIT)
		require -- from WEL_RICH_EDIT
			exists: exists

	set_capture
			-- Set the mouse capture to the Current window.
			-- Once the window has captured the mouse, all
			-- mouse input is directed to this window, regardless
			-- of whether the cursor is over that window. Only
			-- one window can have the mouse capture at a time.
			--
			-- Works only for windows in the same thread as your
			-- application.
			-- (from WEL_WINDOW)
		require -- from  EV_PICK_AND_DROPABLE_IMP
			True
		require -- from  EV_DOCKABLE_SOURCE_IMP
			True
		require -- from WEL_WINDOW
			exists: exists
			has_not_capture: not wel_has_capture

	wel_set_caret_position (position: INTEGER_32)
			-- Set the caret position with position.
			-- (from WEL_RICH_EDIT)
		require -- from  EV_TEXT_COMPONENT_IMP
			True
		require -- from WEL_EDIT
			exists: exists
			position_large_enough: position >= 0
			position_small_enough: position <= wel_text_length
		ensure -- from WEL_EDIT
			has_no_selection: not has_selection
			caret_position_set: wel_caret_position = position

	set_caret_position (pos: INTEGER_32)
			-- set current caret position.
			-- (from EV_TEXT_COMPONENT_IMP)
		require -- from EV_TEXT_COMPONENT_I
			valid_caret_position: pos >= 1 and pos <= text_length + 1

	set_configurable_target_menu_handler (a_handler: like configurable_target_menu_handler)
			-- Set Configurable Target Menu Handler to a_handler.
			-- (from EV_PICK_AND_DROPABLE_I)

	set_configurable_target_menu_mode
			-- Set transport mechanism to a configurable target_menu.
			-- (from EV_PICK_AND_DROPABLE_I)
		ensure -- from EV_PICK_AND_DROPABLE_I
			mode_is_target_menu: mode_is_configurable_target_menu

	set_current_format (format: EV_CHARACTER_FORMAT)
			-- apply format to current caret position, applicable
			-- to next typed characters.
		require -- from EV_RICH_TEXT_I
			format_not_void: format /= Void
		ensure -- from EV_RICH_TEXT_I
			text_not_changed: text.is_equal (old text)
			caret_not_moved: caret_position = old caret_position
			selection_not_changed: old has_selection = has_selection and has_selection implies old start_selection = start_selection and old end_selection = end_selection

	set_default_font
			-- Make system to use default font.
			-- (from EV_FONTABLE_IMP)

	set_default_key_processing_handler (a_handler: like default_key_processing_handler)
			-- Assign `default_key_processing_handler` to a_handler.
			-- (from EV_WIDGET_I)

	set_default_tab_stops
			-- Set default tab stops.
			-- (from WEL_RICH_EDIT)
		require -- from WEL_MULTIPLE_LINE_EDIT
			exists: exists

	set_deny_cursor (a_cursor: like deny_cursor)
			-- Set a_cursor to be displayed when the screen pointer is over a
			-- target that doesn't accept `pebble` during pick and drop.
			-- (from EV_PICK_AND_DROPABLE_I)

	set_drag_and_drop_mode
			-- Set transport mechanism to drag and drop,
			-- (from EV_PICK_AND_DROPABLE_I)
		ensure -- from EV_PICK_AND_DROPABLE_I
			mode_is_drag_and_drop: mode_is_drag_and_drop

	set_editable (flag: BOOLEAN)
			-- If flag then make Current editable else
			-- make Current component read-only.
			-- (from EV_TEXT_COMPONENT_IMP)

	set_event_mask (an_event_mask: INTEGER_32)
			-- Set `event_mask` with an_event_mask.
			-- See class WEL_ENM_CONSTANTS for values.
			-- (from WEL_RICH_EDIT)
		require -- from WEL_RICH_EDIT
			exists: exists
		ensure -- from WEL_RICH_EDIT
			event_mask_set: event_mask = an_event_mask

	set_ex_style (an_ex_style: INTEGER_32)
			-- Set an_ex_style with `ex_style`.
			-- (from WEL_WINDOW)
		require -- from WEL_WINDOW
			exists: exists

	set_focus
			-- Set the focus to Current
			-- (from WEL_WINDOW)
		require -- from  EV_WIDGET_I
			True
		require -- from WEL_WINDOW
			exists: exists

	set_font (ft: EV_FONT)
			-- Make ft new font of Current.
			-- (from EV_FONTABLE_IMP)
		require -- from EV_FONTABLE_I
			a_font_not_void: ft /= Void
		ensure -- from EV_FONTABLE_I
			assigned: is_usable implies font.is_equal (ft)

	set_formatting_rect (rect: WEL_RECT)
			-- Set `formatting_rect` with rect.
			-- (from WEL_MULTIPLE_LINE_EDIT)
		require -- from WEL_MULTIPLE_LINE_EDIT
			exists: exists
			rect_not_void: rect /= Void
			rect_exists: rect.exists

	set_modify (modify: BOOLEAN)
			-- Set `modified` with modify
			-- (from WEL_EDIT)
		require -- from WEL_EDIT
			exists: exists
		ensure -- from WEL_EDIT
			modified_set: modified = modify

	set_options (operation, an_options: INTEGER_32)
			-- Set the opetions for the control.
			-- See class WEL_ECO_CONSTANTS for values.
			-- (from WEL_RICH_EDIT)
		require -- from WEL_RICH_EDIT
			exists: exists

	set_pebble (a_pebble: ANY)
			-- Assign a_pebble to `pebble`.
			-- (from EV_PICK_AND_DROPABLE_I)
		require -- from EV_PICK_AND_DROPABLE_I
			a_pebble_not_void: a_pebble /= Void
		ensure -- from EV_PICK_AND_DROPABLE_I
			pebble_assigned: pebble = a_pebble
			is_transport_enabled: is_transport_enabled

	set_pebble_function (a_function: FUNCTION [detachable ANY])
			-- Assign a_function to `pebble_function`.
			-- (from EV_PICK_AND_DROPABLE_I)
		require -- from EV_PICK_AND_DROPABLE_I
			a_function_not_void: a_function /= Void
		ensure -- from EV_PICK_AND_DROPABLE_I
			pebble_function_assigned: pebble_function = a_function
			is_transport_enabled: is_transport_enabled

	set_pebble_position (a_x, a_y: INTEGER_32)
			-- Set the initial position for pick and drop relative to Current.
			-- (from EV_PICK_AND_DROPABLE_I)
		ensure -- from EV_PICK_AND_DROPABLE_I
			pick_x_assigned: pick_x.to_integer_32 = a_x
			pick_y_assigned: pick_y.to_integer_32 = a_y

	set_pick_and_drop_mode
			-- Set transport mechanism to pick and drop,
			-- (from EV_PICK_AND_DROPABLE_I)
		ensure -- from EV_PICK_AND_DROPABLE_I
			mode_is_pick_and_drop: mode_is_pick_and_drop

	set_read_only
			-- Set the read-only state.
			-- (from WEL_EDIT)
		require -- from  EV_TEXT_COMPONENT_IMP
			True
		require -- from WEL_EDIT
			exists: exists

	set_read_write
			-- Set the read-write state.
			-- (from WEL_EDIT)
		require -- from  EV_TEXT_COMPONENT_IMP
			True
		require -- from WEL_EDIT
			exists: exists

	set_real_source (dockable_source: EV_DOCKABLE_SOURCE)
			-- Set dockable_source to be the widget moved when a
			-- drag begins on Current.
			-- (from EV_DOCKABLE_SOURCE_I)
		require -- from EV_DOCKABLE_SOURCE_I
			is_dockable: is_dockable
			dockable_source_not_void: dockable_source /= Void
		ensure -- from EV_DOCKABLE_SOURCE_I
			real_source_assigned: real_source = dockable_source

	set_real_target (a_target: EV_DOCKABLE_TARGET)
			-- Assign a_target to `real_target`.
			-- (from EV_WIDGET_I)
		require -- from EV_WIDGET_I
			target_not_void: a_target /= Void
		ensure -- from EV_WIDGET_I
			assigned: real_target = a_target

	wel_set_selection (start_position, end_position: INTEGER_32)
			-- Set the selection between start_position
			-- and end_position.
			-- (from WEL_RICH_EDIT)
		require -- from EV_TEXT_COMPONENT_IMP
			exists: exists
			selection_in_lower_bound: start_position >= 0 and end_position >= 0
			selection_in_upper_bound: start_position <= wel_text_length and end_position <= wel_text_length
		require -- from WEL_EDIT
			exists: exists
			selection_in_lower_bound: start_position >= 0 and end_position >= 0
			selection_in_upper_bound: start_position <= wel_text_length and end_position <= wel_text_length
		require else -- from WEL_RICH_EDIT
			selection_in_upper_bound: start_position <= wel_text_length and end_position <= wel_text_length + 1
		ensure -- from WEL_EDIT
			has_selection: (start_position /= end_position) implies has_selection

	set_shared
			-- Set `shared` to True.
			-- (from WEL_ANY)
		ensure -- from WEL_ANY
			shared: shared

	set_style (a_style: INTEGER_32)
			-- Set `style` with a_style.
			-- (from WEL_WINDOW)
		require -- from  EV_WIDGET_IMP
			True
		require -- from WEL_WINDOW
			exists: exists

	set_tab_stops (tab: INTEGER_32)
			-- Set tab stops at every tab dialog box units.
			-- (from WEL_RICH_EDIT)
		require -- from WEL_MULTIPLE_LINE_EDIT
			exists: exists
			positive_tab: tab > 0

	set_tab_stops_array (tab: ARRAY [INTEGER_32])
			-- Set tab stops using the values of tab.
			-- (from WEL_RICH_EDIT)
		require -- from WEL_MULTIPLE_LINE_EDIT
			exists: exists
			tab_not_void: tab /= Void
			tab_large_enough: tab.count > 1

	set_tab_width (a_width: INTEGER_32)
			-- Assign a_width in pixels to `tab_width`.
		require -- from EV_RICH_TEXT_I
			width_positive: a_width > 0
		ensure -- from EV_RICH_TEXT_I
			tab_width_set: tab_width = a_width
			text_not_changed: text.is_equal (old text)
			caret_not_moved: caret_position = old caret_position
			selection_not_changed: old has_selection = has_selection and has_selection implies old start_selection = start_selection and old end_selection = end_selection

	set_target_menu_mode
			-- Set transport mechanism to a target_menu.
			-- (from EV_PICK_AND_DROPABLE_I)
		ensure -- from EV_PICK_AND_DROPABLE_I
			mode_is_target_menu: mode_is_target_menu

	wel_set_text (a_text: detachable READABLE_STRING_GENERAL)
			-- Set `text` with a_text.
			-- (from WEL_RICH_EDIT)
		require -- from WEL_WINDOW
			exists: exists
		ensure -- from WEL_WINDOW
			text_set_when_not_void: a_text /= Void implies wel_text.same_string_general (a_text)
			text_set_when_void: a_text = Void implies wel_text.count = 0

	set_text (a_text: READABLE_STRING_GENERAL)
			-- Set `text` with a_text.
		require -- from EV_TEXTABLE_I
			a_text_not_void: a_text /= Void
			no_carriage_returns: not a_text.has_code (('%R').natural_32_code)
		ensure -- from EV_TEXTABLE_I
			text_cloned: attached a_text as l_text and then text.same_string_general (l_text) and then text /= l_text

	set_text_limit (limit: INTEGER_32)
			-- Set to limit the length of the text the user
			-- can enter into the edit control.
			-- (from WEL_EDIT)
		require -- from WEL_EDIT
			exists: exists
			positive_limit: limit >= 0
		require -- from  EV_TEXT_COMPONENT_IMP
			True

	set_unshared
			-- Set `shared` to False.
			-- (from WEL_ANY)
		ensure -- from WEL_ANY
			unshared: not shared

	show
			-- Show Current.
			-- Need to notify the parent.
			-- (from EV_WIDGET_IMP)
		require -- from  EV_WIDGET_I
			True
		require -- from WEL_WINDOW
			exists: exists

	show_configurable_target_menu (a_x, a_y: INTEGER_32)
			-- Show the configurable target menu at position a_x, a_y relative to Current.
			-- (from EV_PICK_AND_DROPABLE_I)

	text_stream_in (stream: WEL_RICH_EDIT_STREAM_IN)
			-- Start a text stream in operation with stream.
		require -- from WEL_RICH_EDIT
			exists: exists
			stream_not_void: stream /= Void
			stream_exists: stream.exists

	update_cached_style (new_ex_style, old_ex_style: INTEGER_32)
			-- Update Window cache buffer for Window style.
			-- (from WEL_WINDOW)

	update_tab_positions (value: INTEGER_32)
			-- Update tab widths based on contents of `tab_positions`.
			-- value is the index of the changed value when called directly by `tab_positions`, as
			-- the result of a list modification, and is not used.
			-- Therefore, when calling `update_tab_positions` explicitly, any value may be passed.

	user_disable_sensitive
			-- Make object desensitive to user input.
			-- (from EV_SENSITIVE_I)
		ensure -- from EV_SENSITIVE_I
			is_desensitive: not user_is_sensitive

	user_enable_sensitive
			-- Make object sensitive to user input.
			-- (from EV_SENSITIVE_I)
		ensure -- from EV_SENSITIVE_I
			is_sensitive_if_parent_sensitive: (has_parent and then parent_is_sensitive) implies attached_interface.implementation.is_sensitive
			is_sensitive_if_orphaned: not has_parent implies attached_interface.implementation.is_sensitive
	
feature -- Element change

	disable_redraw
			-- Disable redrawing of Current until next call to `enable_redraw`.
			-- (from WEL_WINDOW)
		require -- from WEL_WINDOW
			exists: exists

	has_system_window_locked: BOOLEAN
			-- Is there any window locked ?
			-- (from WEL_WINDOW)

	ignore_filtered_message
			-- Call this message from within `on_en_msgfilter`
			-- to prevent the filtered message to be handled
			-- by the Rich Edit Control.
			-- (from WEL_RICH_EDIT)

	lock_window_update
			-- Disables drawing in the current window. A locked window cannot be moved.
			-- Only one window can be locked at a time. To unlock a window locked with
			-- `lock_window_update` , call 'unlock_window_update'.
			-- (from WEL_WINDOW)
		require -- from WEL_WINDOW
			exists: exists
		ensure -- from WEL_WINDOW
			has_system_window_locked

	print_all (dc: WEL_PRINTER_DC; title: READABLE_STRING_GENERAL)
			-- Print the contents of the rich edit control on
			-- the printer dc. title is the printer job name.
			-- (from WEL_RICH_EDIT)
		require -- from WEL_RICH_EDIT
			exists: exists
			dc_not_void: dc /= Void
			dc_exists: dc.exists
			title_not_void: title /= Void

	remove_help_context
			-- Remove key press action associated with EV_APPLICATION.help_key.
			-- (from EV_HELP_CONTEXTABLE_I)
		require -- from EV_HELP_CONTEXTABLE_I
			help_context_not_void: help_context /= Void
		ensure -- from EV_HELP_CONTEXTABLE_I
			no_help_context: internal_help_context = Void

	set_character_format_all (a_char_format: WEL_CHARACTER_FORMAT)
			-- Apply a_char_format to all text.
			-- (from WEL_RICH_EDIT)
		require -- from WEL_RICH_EDIT
			exists: exists
			a_char_format_not_void: a_char_format /= Void
			a_char_format_exists: a_char_format.exists

	set_character_format_selection (a_char_format: WEL_CHARACTER_FORMAT)
			-- Apply a_char_format to current selection.
			-- (from WEL_RICH_EDIT)
		require -- from WEL_RICH_EDIT
			exists: exists
			a_char_format_not_void: a_char_format /= Void
			a_char_format_exists: a_char_format.exists

	set_character_format_word (a_char_format: WEL_CHARACTER_FORMAT)
			-- Set the current word with a_char_format.
			-- (from WEL_RICH_EDIT)
		require -- from WEL_RICH_EDIT
			exists: exists
			a_char_format_not_void: a_char_format /= Void
			a_char_format_exists: a_char_format.exists

	set_default_colors
			-- Set foreground and background color to their default values.
			-- (from EV_WIDGET_IMP)
		require -- from  EV_COLORIZABLE_I
			True

	wel_set_font (a_font: WEL_FONT)
			-- Set `font` with a_font.
			-- (from WEL_CONTROL)
		require -- from  EV_FONTABLE_IMP
			True
		require -- from  EV_TEXT_COMPONENT_IMP
			True
		require -- from WEL_CONTROL
			exists: exists
			a_font_not_void: a_font /= Void
			a_font_exists: a_font.exists
		ensure -- from WEL_CONTROL
			font_set: not has_system_font implies wel_font.item = a_font.item

	set_foreground_color (color: EV_COLOR)
			-- Make color the new `foreground_color`
			-- (from EV_WIDGET_IMP)
		require -- from EV_COLORIZABLE_I
			a_color_not_void: color /= Void
		ensure -- from EV_COLORIZABLE_I
			foreground_color_assigned: is_initialized implies foreground_color.is_equal (color)

	set_help_context (an_help_context: like help_context)
			-- Assign a_help_context to `help_context`.
			-- Assign an_help_context to `help_context`.
			-- (from EV_HELP_CONTEXTABLE_I)
		require -- from EV_HELP_CONTEXTABLE_I
			an_help_context_not_void: an_help_context /= Void
		ensure -- from EV_HELP_CONTEXTABLE_I
			help_context_assigned: attached help_context as l_help_context and then l_help_context ~ an_help_context

	set_item (an_item: POINTER)
			-- Set item with an_item
			-- (from WEL_ANY)
		ensure -- from WEL_ANY
			item_set: wel_item = an_item

	set_paragraph_format (a_para_format: WEL_PARAGRAPH_FORMAT)
			-- Set the current paragraph with a_para_format.
			-- (from WEL_RICH_EDIT)
		require -- from WEL_RICH_EDIT
			exists: exists
			a_para_format_not_void: a_para_format /= Void
			a_para_format_exists: a_para_format.exists

	wel_set_parent (a_parent: detachable WEL_WINDOW)
			-- Change the parent of the current window.
			-- (from WEL_WINDOW)
		require -- from EV_WIDGET_IMP
			exists: exists
		require -- from WEL_WINDOW
			exists: exists

	set_parent_imp (par_imp: detachable EV_CONTAINER_IMP)
			-- Make par the new parent of the widget.
			-- par can be Void then the parent is the
			-- default_parent.
			-- (from EV_PRIMITIVE_IMP)

	set_placement (a_placement: WEL_WINDOW_PLACEMENT)
			-- Set `placement` with a_placement
			-- (from WEL_WINDOW)
		require -- from WEL_WINDOW
			exists: exists
			a_placement_not_void: a_placement /= Void
			a_placement_exists: a_placement.exists

	set_timer (timer_id, time_out: INTEGER_32)
			-- Set a timer identified by timer_id with a
			-- time_out value (in milliseconds).
			-- See also `on_timer`, `kill_timer`.
			-- (from WEL_WINDOW)
		require -- from WEL_WINDOW
			exists: exists
			positive_timer_id: timer_id > 0
			positive_time_out: time_out > 0

	set_tooltip (a_tooltip: READABLE_STRING_GENERAL)
			-- Assign a_tooltip to `tooltip`.
			-- (from EV_WEL_TOOLTIPABLE)
		require -- from EV_TOOLTIPABLE_I
			a_tooltip_not_void: a_tooltip /= Void

	set_top_level_window_imp (a_window: detachable EV_WINDOW_IMP)
			-- Make a_window the new `top_level_window_imp`
			-- of Current.
			-- (from EV_PRIMITIVE_IMP)

	set_x (a_x: INTEGER_32)
			-- Set `x` with a_x
			-- (from WEL_WINDOW)
		require -- from WEL_WINDOW
			exists: exists

	set_y (a_y: INTEGER_32)
			-- Set `y` with a_y
			-- (from WEL_WINDOW)
		require -- from WEL_WINDOW
			exists: exists

	unlock_window_update
			-- Unlock a locked window.	
			-- (from WEL_WINDOW)
		require -- from WEL_WINDOW
			exists: exists
	
feature -- Removal

	wel_destroy
			-- Destroy the window.
			-- (from WEL_WINDOW)
		require -- from  EV_WIDGET_IMP
			True
		require -- from WEL_WINDOW
			exists: exists
		ensure -- from WEL_WINDOW
			not_exists: not exists

	dispose
			-- Free allocated memory.
			-- (from WEL_WINDOW)
		require -- from  DISPOSABLE
			True
	
feature -- Resizing

	reset_minimum_height
			-- Reset the minimum height.
			-- (from EV_SIZEABLE_IMP)
		require -- from  EV_WIDGET_I
			True

	reset_minimum_size
			-- Reset the minimum size (width and height).
			-- (from EV_SIZEABLE_IMP)
		require -- from  EV_WIDGET_I
			True

	reset_minimum_width
			-- Reset the minimum width.
			-- (from EV_SIZEABLE_IMP)
		require -- from  EV_WIDGET_I
			True

	set_height (value: INTEGER_32)
			-- Make value the new height of Current.
			-- (from EV_SIZEABLE_IMP)
		require -- from WEL_WINDOW
			exists: exists
		require -- from EV_SIZEABLE_IMP
			not_is_destroyed: not is_destroyed

	set_minimum_height (value: INTEGER_32)
			-- Make value the new `minimum_height` of Current.
			-- There is no need to grow Current if its size is
			-- too small, the parent will do it if necessary.
			-- (from EV_SIZEABLE_IMP)
		require -- from EV_WIDGET_I
			a_minimum_height_positive: value >= 0
		require -- from EV_SIZEABLE_IMP
			not_is_destroyed: not is_destroyed
		ensure -- from EV_WIDGET_I
			minimum_height_assigned: is_usable implies ((value > 0 implies attached_interface.minimum_height = value) or (value = 0 implies (attached_interface.minimum_height <= 1)))

	set_minimum_size (mw, mh: INTEGER_32)
			-- Make mw the new minimum_width and mh the new
			-- minimum_height of Current.
			-- (from EV_SIZEABLE_IMP)
		require -- from EV_WIDGET_I
			a_minimum_width_positive: mw >= 0
			a_minimum_height_positive: mh >= 0
		require -- from EV_SIZEABLE_IMP
			not_is_destroyed: not is_destroyed
		ensure -- from EV_WIDGET_I
			minimum_width_assigned: is_usable implies ((mw > 0 implies attached_interface.minimum_width = mw) or (mw = 0 implies (attached_interface.minimum_width <= 1)))
			minimum_height_assigned: is_usable implies ((mh > 0 implies attached_interface.minimum_height = mh) or (mh = 0 implies (attached_interface.minimum_height <= 1)))

	set_minimum_width (value: INTEGER_32)
			-- Make value the new `minimum_width` of Current.
			-- There is no need to grow Current if its size is
			-- too small, the parent will do it if necessary.
			-- (from EV_SIZEABLE_IMP)
		require -- from EV_WIDGET_I
			a_minimum_width_positive: value >= 0
		require -- from EV_SIZEABLE_IMP
			not_is_destroyed: not is_destroyed
		ensure -- from EV_WIDGET_I
			minimum_width_assigned: is_usable implies ((value > 0 implies attached_interface.minimum_width = value) or (value = 0 implies (attached_interface.minimum_width <= 1)))

	set_minimum_width_in_characters (nb: INTEGER_32)
			-- Make a minimum of nb characters visible on one line.
			-- (from EV_TEXT_COMPONENT_IMP)
		require -- from EV_TEXT_COMPONENT_I
			valid_nb: nb > 0

	set_size (w, h: INTEGER_32)
			-- Resize Current.
			-- (from EV_SIZEABLE_IMP)
		require -- from EV_SIZEABLE_IMP
			not_is_destroyed: not is_destroyed

	set_width (value: INTEGER_32)
			-- Make value the new width of Current.
			-- (from EV_SIZEABLE_IMP)
		require -- from WEL_WINDOW
			exists: exists
		require -- from EV_SIZEABLE_IMP
			not_is_destroyed: not is_destroyed
	
feature -- Conversion

	key_code_from_wel (a_wel_code: INTEGER_32): INTEGER_32
			-- Corresponding key code for a_wel_code.
			-- (from EV_WEL_KEY_CONVERSION)
		require -- from EV_WEL_KEY_CONVERSION
			a_wel_code_valid: valid_wel_code (a_wel_code)

	key_code_to_wel (a_key_code: INTEGER_32): INTEGER_32
			-- Corresponding WEL code for a_key_code.
			-- (from EV_WEL_KEY_CONVERSION)
		require -- from EV_WEL_KEY_CONVERSION
			a_key_code_valid: valid_key_code (a_key_code)
	
feature -- Duplication

	copy (other: EV_RICH_TEXT_IMP)
			-- Update current object using fields of object attached
			-- to other, so as to yield equal objects.
			-- (from ANY)
		require -- from ANY
			other_not_void: other /= Void
			type_identity: same_type (other)
		ensure -- from ANY
			is_equal: Current ~ other

	frozen deep_copy (other: EV_RICH_TEXT_IMP)
			-- Effect equivalent to that of:
			--		`copy` (other . `deep_twin`)
			-- (from ANY)
		require -- from ANY
			other_not_void: other /= Void
		ensure -- from ANY
			deep_equal: deep_equal (Current, other)

	frozen deep_twin: EV_RICH_TEXT_IMP
			-- New object structure recursively duplicated from Current.
			-- (from ANY)
		ensure -- from ANY
			deep_twin_not_void: Result /= Void
			deep_equal: deep_equal (Current, Result)

	frozen standard_copy (other: EV_RICH_TEXT_IMP)
			-- Copy every field of other onto corresponding field
			-- of current object.
			-- (from ANY)
		require -- from ANY
			other_not_void: other /= Void
			type_identity: same_type (other)
		ensure -- from ANY
			is_standard_equal: standard_is_equal (other)

	frozen standard_twin: EV_RICH_TEXT_IMP
			-- New object field-by-field identical to other.
			-- Always uses default copying semantics.
			-- (from ANY)
		ensure -- from ANY
			standard_twin_not_void: Result /= Void
			equal: standard_equal (Result, Current)

	frozen twin: EV_RICH_TEXT_IMP
			-- New object equal to Current
			-- `twin` calls `copy`; to change copying/twinning semantics, redefine `copy`.
			-- (from ANY)
		ensure -- from ANY
			twin_not_void: Result /= Void
			is_equal: Result ~ Current
	
feature -- Miscellaneous

	Cw_usedefault: INTEGER_32 = -2147483648
			-- Declared in Windows as CW_USEDEFAULT
			-- (from WEL_WS_CONSTANTS)
	
feature -- Basic operations

	bring_to_top
			-- Bring this window to the top of the Z order.
			--
			-- Note:
			--  * If the window is a top-level window, it is activated.
			--  * If the window is a child window, the top-level parent window
			--    associated with the child window is activated.
			-- (from WEL_WINDOW)
		require -- from WEL_WINDOW
			exists: exists

	clear
			-- Clear the text.
			-- (from WEL_STATIC)
		require -- from WEL_STATIC
			exists: exists
		ensure -- from WEL_STATIC
			text_empty: wel_text.is_empty

	clear_flag (flags, mask: INTEGER_32): INTEGER_32
			-- Clear the mask in flags
			-- (from WEL_BIT_OPERATIONS)
		ensure -- from WEL_BIT_OPERATIONS
			flag_unset: not flag_set (Result, mask)

	copy_selection
			-- Copy the current selection to the clipboard.
			-- (from WEL_EDIT)
		require -- from EV_TEXT_COMPONENT_I
			has_selection: has_selection
		require -- from WEL_EDIT
			exists: exists
			has_selection: has_selection

	clip_copy
			-- Copy the current selection to the clipboard.
			-- (from WEL_EDIT)
		require -- from WEL_EDIT
			exists: exists
			has_selection: has_selection

	cut_selection
			-- Cut the current selection to the clipboard.
			-- (from WEL_EDIT)
		require -- from EV_TEXT_COMPONENT_I
			has_selection: has_selection
			is_editable: is_editable
		require -- from WEL_EDIT
			exists: exists
			has_selection: has_selection
		ensure -- from WEL_EDIT
			has_no_selection: not has_selection

	clip_cut
			-- Cut the current selection to the clipboard.
			-- (from WEL_EDIT)
		require -- from WEL_EDIT
			exists: exists
			has_selection: has_selection
		ensure -- from WEL_EDIT
			has_no_selection: not has_selection

	clip_paste
			-- Paste at the current caret position the
			-- content of the clipboard.
			-- (from WEL_EDIT)
		require -- from  EV_TEXT_COMPONENT_IMP
			True
		require -- from WEL_EDIT
			exists: exists

	close_dockable_dialog (dockable_dialog: EV_DOCKABLE_DIALOG)
			-- Close request received by dockable_dialog so
			-- restore widget contained back to its original position
			-- in its old parent if possible.
			-- We must fire dock_ended actions.
			-- (from EV_DOCKABLE_SOURCE_I)
		ensure -- from EV_DOCKABLE_SOURCE_I
			dockable_dialog_destroyed: dockable_dialog.is_destroyed

	complete_dock
			-- Complete a dock from `source_being_docked`.
			-- (from EV_DOCKABLE_SOURCE_I)
		require -- from EV_DOCKABLE_SOURCE_I
			source_being_docked: source_being_docked /= Void
		ensure -- from EV_DOCKABLE_SOURCE_I
			not_dock_executing: not is_dock_executing
			insert_separator_not_parented: Insert_sep.parent = Void
			insert_label_not_parented: Insert_label.parent = Void

	cwin_hi_word (value: POINTER): INTEGER_32
			-- SDK HIWORD
			-- (from WEL_WORD_OPERATIONS)

	cwin_lo_word (value: POINTER): INTEGER_32
			-- SDK LOWORD
			-- (from WEL_WORD_OPERATIONS)

	cwin_make_long (low, high: INTEGER_32): POINTER
			-- SDK MAKELONG
			-- (from WEL_WORD_OPERATIONS)

	cwin_make_lparam (low, high: INTEGER_32): POINTER
			-- SKD MAKELPARAM
			-- (from WEL_WORD_OPERATIONS)

	frozen default: detachable EV_RICH_TEXT_IMP
			-- Default value of object's type
			-- (from ANY)

	frozen default_pointer: POINTER
			-- Default value of type POINTER
			-- (Avoid the need to write p.`default` for
			-- some p of type POINTER.)
			-- (from ANY)
		ensure -- from ANY
			instance_free: class

	default_process_notification (notification_code: INTEGER_32)
			-- Process a notification_code which has not been
			-- processed by `process_notification`.
			-- (from WEL_CONTROL)
		require -- from WEL_CONTROL
			exists: exists

	default_rescue
			-- Process exception for routines with no Rescue clause.
			-- (Default: do nothing.)
			-- (from ANY)

	delete_selection
			-- Delete the current selection.
			-- (from WEL_EDIT)
		require -- from EV_TEXT_COMPONENT_I
			has_selection: has_selection
			is_editable: is_editable
		require -- from WEL_EDIT
			exists: exists
			has_selection: has_selection
		ensure -- from EV_TEXT_COMPONENT_I
			has_no_selection: not has_selection
		ensure -- from WEL_EDIT
			has_no_selection: not has_selection

	disable_horizontal_scroll_bar
			-- Disable the horizontal scroll bar.
			-- (from WEL_WINDOW)
		require -- from WEL_WINDOW
			exists: exists

	disable_vertical_scroll_bar
			-- Disable the vertical scroll bar.
			-- (from WEL_WINDOW)
		require -- from WEL_WINDOW
			exists: exists

	frozen do_nothing
			-- Execute a null action.
			-- (from ANY)
		ensure -- from ANY
			instance_free: class

	eif_current_object_id: INTEGER_32
			-- New identifier for Current
			-- (from IDENTIFIED_ROUTINES)
		ensure -- from IDENTIFIED_ROUTINES
			eif_current_object_id: Result > 0
			inserted: eif_is_object_id_of_current (Result)

	eif_id_any_object (an_id: INTEGER_32): detachable ANY
			-- Object associated with an_id
			-- (from IDENTIFIED_ROUTINES)
		require -- from IDENTIFIED_ROUTINES
			an_id_non_negative: an_id >= 0
		ensure -- from IDENTIFIED_ROUTINES
			instance_free: class

	eif_is_object_id_of_current (an_id: INTEGER_32): BOOLEAN
			-- Is an_id the associated object ID of Current.
			-- (from IDENTIFIED_ROUTINES)
		require -- from IDENTIFIED_ROUTINES
			an_id_non_negative: an_id >= 0

	eif_object_id (an_object: ANY): INTEGER_32
			-- New identifier for an_object
			-- (from IDENTIFIED_ROUTINES)
		ensure -- from IDENTIFIED_ROUTINES
			instance_free: class
			eif_object_id_positive: Result > 0
			inserted: eif_id_any_object (Result) = an_object

	eif_object_id_free (an_id: INTEGER_32)
			-- Free the entry an_id
			-- (from IDENTIFIED_ROUTINES)
		require -- from IDENTIFIED_ROUTINES
			an_id_non_negative: an_id >= 0
		ensure -- from IDENTIFIED_ROUTINES
			instance_free: class
			removed: eif_id_any_object (an_id) = Void

	enable_horizontal_scroll_bar
			-- Enable the horizontal scroll bar.
			-- (from WEL_WINDOW)
		require -- from WEL_WINDOW
			exists: exists

	enable_vertical_scroll_bar
			-- Enable the vertical scroll bar.
			-- (from WEL_WINDOW)
		require -- from WEL_WINDOW
			exists: exists

	find (text_to_find: READABLE_STRING_GENERAL; match_case: BOOLEAN; start_from: INTEGER_32): INTEGER_32
			-- Find text_to_find in WEL_RICH_EDIT
			-- (from WEL_RICH_EDIT)
		require -- from WEL_RICH_EDIT
			text_to_find: text_to_find /= Void

	go_to_next_group_item (a_parent: WEL_COMPOSITE_WINDOW; after: BOOLEAN)
			-- Find the previous or following control with the
			-- Wm_tabstop style in the current group in a_parent
			-- depending on the value of after.
			-- (from WEL_CONTROL)
		require -- from WEL_CONTROL
			valid_parent: a_parent /= Void and then a_parent.exists

	go_to_next_tab_item (a_parent: WEL_COMPOSITE_WINDOW; after: BOOLEAN)
			-- Find the previous or following control with the
			-- Wm_tabstop style in `a_parent depending on the
			-- value of after.
			-- (from WEL_CONTROL)
		require -- from WEL_CONTROL
			valid_parent: a_parent /= Void and then a_parent.exists

	hide_cursor
			-- Hide the cursor.
			-- (from WEL_WINDOWS_ROUTINES)

	hide_horizontal_scroll_bar
			-- Hide the horizontal scroll bar.
			-- (from WEL_WINDOW)
		require -- from WEL_WINDOW
			exists: exists

	hide_scroll_bars
			-- Hide the horizontal and vertical scroll bars.
			-- (from WEL_WINDOW)
		require -- from WEL_WINDOW
			exists: exists

	hide_selection
			-- Hide the selection.
			-- (from WEL_RICH_EDIT)
		require -- from WEL_RICH_EDIT
			exists: exists

	hide_vertical_scroll_bar
			-- Hide the vertical scroll bar.
			-- (from WEL_WINDOW)
		require -- from WEL_WINDOW
			exists: exists

	insert_after (a_window: WEL_WINDOW)
			-- Insert the current window after a_window.
			-- (from WEL_WINDOW)
		require -- from WEL_WINDOW
			exists: exists
			a_window_not_void: a_window /= Void
			a_window_not_current: a_window /= Current
			a_window_exists: a_window.exists

	insert_text_stream_in (stream: WEL_RICH_EDIT_STREAM_IN)
			-- Start a text stream in operation with stream.
			-- (from WEL_RICH_EDIT)
		require -- from WEL_RICH_EDIT
			exists: exists
			stream_not_void: stream /= Void
			stream_exists: stream.exists

	invalidate
			-- Invalide the entire client area of the window. The
			-- background will be erased before.
			-- (from WEL_WINDOW)
		require -- from  EV_WIDGET_IMP
			True
		require -- from WEL_WINDOW
			exists: exists

	invalidate_rect (rect: WEL_RECT; erase_background: BOOLEAN)
			-- Invalidate the area rect and erase
			-- the background if erase_background is True.
			-- (from WEL_WINDOW)
		require -- from WEL_WINDOW
			exists: exists
			rect_not_void: rect /= Void
			rect_exists: rect.exists

	invalidate_region (region: WEL_REGION; erase_background: BOOLEAN)
			-- Invalidate the area region and erase
			-- the background if erase_background is True.
			-- (from WEL_WINDOW)
		require -- from WEL_WINDOW
			exists: exists
			region_not_void: region /= Void
			region_exists: region.exists

	invalidate_without_background
			-- Invalidate the entire client area of the window. The
			-- background will not be erased.
			-- (from WEL_WINDOW)
		require -- from WEL_WINDOW
			exists: exists

	kill_timer (timer_id: INTEGER_32)
			-- Kill the timer identified by timer_id.
			-- See also `set_timer`, `on_timer`.
			-- (from WEL_WINDOW)
		require -- from WEL_WINDOW
			exists: exists
			positive_timer_id: timer_id > 0

	load_rtf_file (file: RAW_FILE)
			-- Load a RTF file in the rich edit control.
			-- (from WEL_RICH_EDIT)
		require -- from WEL_RICH_EDIT
			exists: exists
			file_not_void: file /= Void
			file_exists: file.exists
			file_is_open_read: file.is_open_read
		ensure -- from WEL_RICH_EDIT
			file_closed: file.is_closed

	load_text_file (file: RAW_FILE)
			-- Load a text file in the rich edit control.
			-- (from WEL_RICH_EDIT)
		require -- from WEL_RICH_EDIT
			exists: exists
			file_not_void: file /= Void
			file_exists: file.exists
			file_is_open_read: file.is_open_read
		ensure -- from WEL_RICH_EDIT
			file_closed: file.is_closed

	message_beep_asterisk
			-- Play the system asterisk waveform sound.
			-- (from WEL_WINDOWS_ROUTINES)

	message_beep_exclamation
			-- Play the system exclamation waveform sound.
			-- (from WEL_WINDOWS_ROUTINES)

	message_beep_hand
			-- Play the system hand waveform sound.
			-- (from WEL_WINDOWS_ROUTINES)

	message_beep_ok
			-- Play the system ok waveform sound.
			-- (from WEL_WINDOWS_ROUTINES)

	message_beep_question
			-- Play the system question waveform sound.
			-- (from WEL_WINDOWS_ROUTINES)

	wel_move (a_x, a_y: INTEGER_32)
			-- Move the window to a_x, a_y.
			-- (from WEL_WINDOW)
		require -- from EV_SIZEABLE_IMP
			not_is_destroyed: not is_destroyed
		require -- from WEL_WINDOW
			exists: exists

	move (a_x, a_y: INTEGER_32)
			-- Move the window to a_x, a_y.
			-- (from WEL_WINDOW)
		require -- from WEL_WINDOW
			exists: exists

	wel_move_and_resize (a_x, a_y, a_width, a_height: INTEGER_32; repaint: BOOLEAN)
			-- Move the window to a_x, a_y position and
			-- resize it with a_width, a_height.
			-- (from WEL_WINDOW)
		require -- from EV_SIZEABLE_IMP
			not_is_destroyed: not is_destroyed
		require -- from WEL_WINDOW
			exists: exists

	move_and_resize (a_x, a_y, a_width, a_height: INTEGER_32; repaint: BOOLEAN)
			-- Move the window to a_x, a_y position and
			-- resize it with a_width, a_height.
			-- (from WEL_WINDOW)
		require -- from WEL_WINDOW
			exists: exists

	on_getdlgcode
			-- Called when window receives WM_GETDLGCODE message.
			-- (from EV_PRIMITIVE_IMP)
		require -- from  WEL_WINDOW
			True

	output_debug_string (s: READABLE_STRING_GENERAL)
			-- Send a string s to the system debugger.
			-- (from WEL_WINDOWS_ROUTINES)
		require -- from WEL_WINDOWS_ROUTINES
			s_not_void: s /= Void

	put_command (a_command: WEL_COMMAND; message: INTEGER_32; argument: detachable ANY)
			-- Put a_command associated to message.
			-- (from WEL_WINDOW)
		require -- from WEL_WINDOW
			a_command_not_void: a_command /= Void
			positive_message: message >= 0
		ensure -- from WEL_WINDOW
			command_added: command (message) = a_command and command_argument (message) = argument

	remove_command (message: INTEGER_32)
			-- Remove the command associated to message.
			-- (from WEL_WINDOW)
		require -- from WEL_WINDOW
			positive_message: message >= 0
			command_exists: command_exists (message)
		ensure -- from WEL_WINDOW
			command_removed: not command_exists (message)

	replace_selection (new_text: READABLE_STRING_GENERAL)
			-- Replace the current selection with new_text.
			-- If there is no selection, new_text is inserted
			-- at the current `caret_position`.
			-- (from WEL_EDIT)
		require -- from WEL_EDIT
			exists: exists
			new_text_not_void: new_text /= Void

	wel_resize (a_width, a_height: INTEGER_32)
			-- Resize the window with a_width, a_height.
			-- (from WEL_WINDOW)
		require -- from EV_SIZEABLE_IMP
			not_is_destroyed: not is_destroyed
		require -- from WEL_WINDOW
			exists: exists

	resize (a_width, a_height: INTEGER_32)
			-- Resize the window with a_width, a_height.
			-- (from WEL_WINDOW)
		require -- from WEL_WINDOW
			exists: exists

	resource_string_id (an_id: INTEGER_32): STRING_32
			-- String identified by an_id in the resource file.
			-- (from WEL_WINDOWS_ROUTINES)
		ensure -- from WEL_WINDOWS_ROUTINES
			result_not_void: Result /= Void

	rtf_stream_out (stream: WEL_RICH_EDIT_STREAM_OUT)
			-- Start a rtf stream out operation with stream.
			-- (from WEL_RICH_EDIT)
		require -- from WEL_RICH_EDIT
			exists: exists
			stream_not_void: stream /= Void
			stream_exists: stream.exists

	save_rtf_file (file: RAW_FILE)
			-- Save the contents of the rich edit control in RTF
			-- format in file.
			-- (from WEL_RICH_EDIT)
		require -- from WEL_RICH_EDIT
			exists: exists
			file_not_void: file /= Void
			file_exists: file.exists
			file_is_open_read: file.is_open_write
		ensure -- from WEL_RICH_EDIT
			file_closed: file.is_closed

	save_text_file (file: RAW_FILE)
			-- Save the contents of the rich edit control in text
			-- format in file.
			-- (from WEL_RICH_EDIT)
		require -- from WEL_RICH_EDIT
			exists: exists
			file_not_void: file /= Void
			file_exists: file.exists
			file_is_open_write: file.is_open_write
		ensure -- from WEL_RICH_EDIT
			file_closed: file.is_closed

	scroll (horizontal, vertical: INTEGER_32)
			-- Scroll the text vertically and horizontally.
			-- horizontal is the number of characters to
			-- scroll horizontally, vertical is the number
			-- of lines to scroll vertically.
			-- (from WEL_MULTIPLE_LINE_EDIT)
		require -- from WEL_WINDOW
			exists: exists

	send_stream_in_message (format: INTEGER_32; stream: WEL_RICH_EDIT_STREAM_IN)
			-- Start stream in operation with stream.
			-- See class WEL_SF_CONSTANTS for format values.
			-- Lowest level stream in procedures.
			-- (from WEL_RICH_EDIT)
		require -- from WEL_RICH_EDIT
			exists: exists
			stream_not_void: stream /= Void
			stream_exists: stream.exists

	send_stream_out_message (format: INTEGER_32; stream: WEL_RICH_EDIT_STREAM_OUT)
			-- Start stream out operation with stream.
			-- See class WEL_SF_CONSTANTS for format values.
			-- Lowest level stream out procedures.
			-- (from WEL_RICH_EDIT)
		require -- from WEL_RICH_EDIT
			exists: exists
			stream_not_void: stream /= Void
			stream_exists: stream.exists

	set_class_icon (new_icon: WEL_ICON)
			-- Replace the current icon for the class which this window
			-- belongs to.
			--
			-- The SetClassLong function replaces the specified 32-bit (long)
			-- value at the specified offset into the extra class memory
			-- or the WNDCLASSEX structure for the class to which the
			-- specified window belongs.
			-- (from WEL_WINDOW)
		require -- from WEL_WINDOW
			new_icon_not_void: new_icon /= Void
			new_icon_exists: new_icon.exists

	set_class_small_icon (new_icon: WEL_ICON)
			-- Replace the current icon for the class which this window
			-- belongs to.
			--
			-- The SetClassLong function replaces the specified 32-bit (long)
			-- value at the specified offset into the extra class memory
			-- or the WNDCLASSEX structure for the class to which the
			-- specified window belongs.
			-- (from WEL_WINDOW)
		require -- from WEL_WINDOW
			new_icon_not_void: new_icon /= Void
			new_icon_exists: new_icon.exists

	set_cursor_position_absolute (x, y: INTEGER_32)
			-- Set the cursor position to `x`, `y`.
			-- (from WEL_WINDOWS_ROUTINES)

	set_flag (flags, mask: INTEGER_32): INTEGER_32
			-- Set the mask in flags
			-- (from WEL_BIT_OPERATIONS)
		ensure -- from WEL_BIT_OPERATIONS
			flag_set: flag_set (Result, mask)

	set_z_order (z_order: POINTER)
			-- Set the z-order of the window.
			-- See class WEL_HWND_CONSTANTS for z_order values.
			-- (from WEL_WINDOW)
		require -- from WEL_WINDOW
			exists: exists
			valid_hwnd_constant: valid_hwnd_constant (z_order)

	show_cursor
			-- Show the cursor.
			-- (from WEL_WINDOWS_ROUTINES)

	show_horizontal_scroll_bar
			-- Show the horizontal scroll bar.
			-- (from WEL_WINDOW)
		require -- from WEL_WINDOW
			exists: exists

	show_scroll_bars
			-- Show the horizontal and vertical scroll bars.
			-- (from WEL_WINDOW)
		require -- from WEL_WINDOW
			exists: exists

	show_selection
			-- Show selection.
			-- (from WEL_RICH_EDIT)
		require -- from WEL_RICH_EDIT
			exists: exists

	show_vertical_scroll_bar
			-- Show the vertical scroll bar.
			-- (from WEL_WINDOW)
		require -- from WEL_WINDOW
			exists: exists

	show_with_option (cmd_show: INTEGER_32)
			-- Set the window's visibility with cmd_show.
			-- See class WEL_SW_CONSTANTS for cmd_show value.
			-- (from WEL_WINDOW)
		require -- from WEL_WINDOW
			exists: exists
			parent_shown: attached wel_parent as l_parent implies l_parent.exists and l_parent.shown

	text_stream_out (stream: WEL_RICH_EDIT_STREAM_OUT)
			-- Start a text stream out operation with stream.
			-- (from WEL_RICH_EDIT)
		require -- from WEL_RICH_EDIT
			exists: exists
			stream_not_void: stream /= Void
			stream_exists: stream.exists

	tooltip_window: detachable WEL_WINDOW
			-- Result is WEL_WINDOW of Current used
			-- to trigger tooltip events. May be redefined in
			-- descendents that are composed of more than one window
			-- such as combo boxes.
			-- (from EV_PRIMITIVE_IMP)

	undo
			-- Undo the last operation.
			-- The previously deleted text is restored or the
			-- previously added text is deleted.
			-- (from WEL_EDIT)
		require -- from WEL_EDIT
			exists: exists
			can_undo: can_undo

	deselect_all
			-- Unselect the current selection.
			-- (from WEL_EDIT)
		require -- from  EV_TEXT_COMPONENT_I
			True
		require -- from WEL_EDIT
			exists: exists
			has_selection: has_selection
		ensure -- from EV_TEXT_COMPONENT_I
			has_no_selection: not has_selection
		ensure -- from WEL_EDIT
			has_no_selection: not has_selection

	unselect
			-- Unselect the current selection.
			-- (from WEL_EDIT)
		require -- from WEL_EDIT
			exists: exists
			has_selection: has_selection
		ensure -- from WEL_EDIT
			has_no_selection: not has_selection

	update
			-- Update the client area by sending a Wm_paint message.
			-- (from WEL_WINDOW)
		require -- from  EV_WIDGET_IMP
			True
		require -- from WEL_WINDOW
			exists: exists

	validate
			-- Validate the entire client area of the window.
			-- (from WEL_WINDOW)
		require -- from WEL_WINDOW
			exists: exists

	validate_rect (rect: WEL_RECT)
			-- Validate the area rect.
			-- (from WEL_WINDOW)
		require -- from WEL_WINDOW
			exists: exists
			rect_not_void: rect /= Void
			rect_exists: rect.exists

	validate_region (region: WEL_REGION)
			-- Validate the area region.
			-- (from WEL_WINDOW)
		require -- from WEL_WINDOW
			exists: exists
			region_not_void: region /= Void
			region_exists: region.exists

	win_help_from_path (help_path: PATH; a_command, data: INTEGER_32)
			-- Start the Windows Help program with help_path.
			-- a_command specifies the type of help requested. See
			-- class WEL_HELP_CONSTANTS for a_command values.
			-- 'data' is depandant on 'a_command'.  Check MSDN for more details.
			-- (from WEL_WINDOW)
		require -- from WEL_WINDOW
			exists: exists
			help_file_not_void: help_path /= Void
	
feature -- Obsolete

	Nc_minheight: INTEGER_32 = 2
			-- Used only in the notify_change feature to
			-- notify the parent that the minimum height of
			-- Current has changed.
			-- (from EV_SIZEABLE_IMP)

	Nc_minsize: INTEGER_32 = 3
			-- Used only in the notify_change feature to
			-- notify the parent that both the minimum width
			-- and height of Current widget have changed.
			-- (from EV_SIZEABLE_IMP)

	Nc_minwidth: INTEGER_32 = 1
			-- Used only in the notify_change feature to
			-- notify the parent that the minimum width of
			-- Current has changed.
			-- (from EV_SIZEABLE_IMP)
	
feature -- Inapplicable

	Drag_cursor: EV_POINTER_STYLE
			-- Cursor used when Current is being transported.
			-- (from EV_DOCKABLE_SOURCE_I)
	
feature -- Implementation

	clipboard_content: STRING_32
			-- Result is current clipboard content.
			-- (from EV_TEXT_COMPONENT_IMP)
		require -- from  EV_TEXT_COMPONENT_I
			True

	destroy
			-- Destroy Current.

	enable_redraw
			-- Ensure Current is redrawn as required.
		require -- from WEL_WINDOW
			exists: exists

	internal_disable_dockable
			-- Enable or disable dockable.
			-- This has no implementation on Windows, as we do not need it.
			-- On Gtk, this is necessary, so that the necessary signal
			-- connections may be performed.
			-- Was declared in {EV_DOCKABLE_SOURCE_IMP} as synonym of `internal_enable_dockable`.
			-- (from EV_DOCKABLE_SOURCE_IMP)
		require -- from  EV_DOCKABLE_SOURCE_I
			True

	internal_enable_dockable
			-- Enable or disable dockable.
			-- This has no implementation on Windows, as we do not need it.
			-- On Gtk, this is necessary, so that the necessary signal
			-- connections may be performed.
			-- Was declared in {EV_DOCKABLE_SOURCE_IMP} as synonym of `internal_disable_dockable`.
			-- (from EV_DOCKABLE_SOURCE_IMP)
		require -- from  EV_DOCKABLE_SOURCE_I
			True

	is_control_in_window (hwnd_control: POINTER): BOOLEAN
			-- Is the control of handle hwnd_control
			-- located inside the current window?
			-- (from EV_PRIMITIVE_IMP)
	
feature -- Access EV_DRAGABLE_SOURCE.

	dockable_dialog_target: detachable EV_DOCKABLE_DIALOG
			-- A dockable dialog that will be created as
			-- necessary. This is not a local, to avoid it
			-- being garbage collected.
			-- (from EV_SHARED_TRANSPORT_I)

	Global_drag_targets: ARRAYED_LIST [INTEGER_32]
			-- Shortcut to EV_APPLICATION.pnd_targets.
			-- (from EV_SHARED_TRANSPORT_I)

	frozen Insert_label: EV_CELL
			-- Label used to indicate where Current will be placed in target.
			-- (from EV_SHARED_TRANSPORT_I)
		ensure -- from EV_SHARED_TRANSPORT_I
			result_not_void: Result /= Void

	Insert_label_imp: EV_CELL_I
			-- Once access to implementation of `insert_label`.
			-- (from EV_SHARED_TRANSPORT_I)
		ensure -- from EV_SHARED_TRANSPORT_I
			Result /= Void

	Insert_sep: EV_TOOL_BAR_SEPARATOR
			-- Once access to a separator used to indicate the insertion position
			-- when moving tool bar items.
			-- (from EV_SHARED_TRANSPORT_I)

	Insert_sep_imp: EV_TOOL_BAR_SEPARATOR_I
			-- Once access to implementation of `insert_sep`.
			-- (from EV_SHARED_TRANSPORT_I)
		ensure -- from EV_SHARED_TRANSPORT_I
			Result /= Void

	Internal_screen: EV_SCREEN
			-- Once access to an EV_SCREEN.
			-- (from EV_SHARED_TRANSPORT_I)

	original_x_offset: INTEGER_16
			-- Original x_offset and original_y_offset of transport
			-- realtive to widget. Only used for dragable transports.
			-- (from EV_SHARED_TRANSPORT_I)

	original_y_offset: INTEGER_16
			-- Original x_offset and original_y_offset of transport
			-- realtive to widget. Only used for dragable transports.
			-- (from EV_SHARED_TRANSPORT_I)

	originating_source: detachable EV_DOCKABLE_SOURCE_I
			-- Dragable source that originated the transport of source_being_dragged.
			-- (from EV_SHARED_TRANSPORT_I)

	remove_insert_label
			-- Remove `insert_label` from its current `parent`.
			-- We must handle a special case for cells. If the parent is a cell,
			-- then we remove the cell from its parent, and then restore it.
			-- Otherwise, when the label, removed, the cell keeps it size, and cells
			-- are normally used with `real_target` when the cell must
			-- not be visible.
			-- (from EV_SHARED_TRANSPORT_I)
		ensure -- from EV_SHARED_TRANSPORT_I
			not_parented: Insert_label.parent = Void

	remove_insert_sep
			-- Ensure inset_sep is not parented.
			-- (from EV_SHARED_TRANSPORT_I)
		ensure -- from EV_SHARED_TRANSPORT_I
			not_parented: Insert_sep.parent = Void

	source_being_docked: detachable EV_DOCKABLE_SOURCE_I
			-- Dragable source currently being transported. May be a
			-- WIDGET_IMP or an EV_TOOL_BAR_BUTTON_IMP.
			-- (from EV_SHARED_TRANSPORT_I)
	
feature -- Access EV_PICK_AND_DROPABLE.

	Default_accept_cursor: EV_POINTER_STYLE
			-- Used in lieu of a user defined `accept_cursor`.
			-- (from EV_SHARED_TRANSPORT_I)

	Default_deny_cursor: EV_POINTER_STYLE
			-- Used in lieu of a user defined `deny_cursor`.
			-- (from EV_SHARED_TRANSPORT_I)

	Default_pixmaps: EV_STOCK_PIXMAPS
			-- Default pixmaps
			-- (from EV_SHARED_TRANSPORT_I)

	Global_pnd_targets: HASH_TABLE [INTEGER_32, INTEGER_32]
			-- Shortcut to EV_APPLICATION.pnd_targets.
			-- (from EV_SHARED_TRANSPORT_I)

	rubber_band_is_drawn: BOOLEAN
			-- Is a rubber band line currently on the screen?
			-- (from EV_SHARED_TRANSPORT_I)
	
feature -- Access common.

	pointer_x: INTEGER_16
			-- (from EV_SHARED_TRANSPORT_I)

	pointer_y: INTEGER_16
			-- (from EV_SHARED_TRANSPORT_I)
	
feature -- Assertions

	valid_line_index (i: INTEGER_32): BOOLEAN
			-- Is i a valid line index?
			-- (from EV_TEXT_I)
	
feature -- Basic Operations

	himetric_to_pixel (a_size_in_himetric: WEL_SIZE): WEL_SIZE
			-- Convert himetric into pixels.
			-- (from WEL_UNIT_CONVERSION)
		require -- from WEL_UNIT_CONVERSION
			non_void_size: a_size_in_himetric /= Void
			a_size_in_himetric_exists: a_size_in_himetric.exists
		ensure -- from WEL_UNIT_CONVERSION
			non_void_result: Result /= Void

	logical_to_pixel (hdc: WEL_DC; lo: INTEGER_32): INTEGER_32
			-- Convert lo expressed in logical unit into pixel unit.
			-- (from WEL_UNIT_CONVERSION)
		require -- from WEL_UNIT_CONVERSION
			hdc_not_void: hdc /= Void
			hdc_exists: hdc.exists

	logical_to_point (hdc: WEL_DC; lo: INTEGER_32): INTEGER_32
			-- Convert a size lo expressed in logical unit into point.
			-- (from WEL_UNIT_CONVERSION)
		require -- from WEL_UNIT_CONVERSION
			hdc_not_void: hdc /= Void
			hdc_exists: hdc.exists

	map_loghim_to_pixel (x, ppli: INTEGER_32): INTEGER_32
			-- Defined as MAP_LOGHIM_TO_PIX in AtlWin.h
			-- (from WEL_UNIT_CONVERSION)

	map_pixel_to_loghim (x, ppli: INTEGER_32): INTEGER_32
			-- Defined as MAP_PIX_TO_LOGHIM in AtlWin.h
			-- (from WEL_UNIT_CONVERSION)

	pixel_to_himetric (a_size_in_pixel: WEL_SIZE): WEL_SIZE
			-- Convert pixels into himetric.
			-- (from WEL_UNIT_CONVERSION)
		require -- from WEL_UNIT_CONVERSION
			non_void_size: a_size_in_pixel /= Void
			a_size_in_pixel_exists: a_size_in_pixel.exists
		ensure -- from WEL_UNIT_CONVERSION
			non_void_result: Result /= Void

	pixel_to_logical (hdc: WEL_DC; pi: INTEGER_32): INTEGER_32
			-- Convert pi expressed in pixel unit into logical unit.
			-- (from WEL_UNIT_CONVERSION)
		require -- from WEL_UNIT_CONVERSION
			hdc_not_void: hdc /= Void
			hdc_exists: hdc.exists

	pixel_to_point (hdc: WEL_DC; pi: INTEGER_32): INTEGER_32
			-- Convert a size pi expressed in pixel into point.
			-- (from WEL_UNIT_CONVERSION)
		require -- from WEL_UNIT_CONVERSION
			hdc_not_void: hdc /= Void
			hdc_exists: hdc.exists

	point_to_logical (hdc: WEL_DC; pt, divisor: INTEGER_32): INTEGER_32
			-- Convert a size pt/divisor expressed in point into logical units.
			-- (from WEL_UNIT_CONVERSION)
		require -- from WEL_UNIT_CONVERSION
			hdc_not_void: hdc /= Void
			hdc_exists: hdc.exists

	point_to_pixel (hdc: WEL_DC; pt, divisor: INTEGER_32): INTEGER_32
			-- Convert a size pt/divisor expressed in point into pixel.
			-- (from WEL_UNIT_CONVERSION)
		require -- from WEL_UNIT_CONVERSION
			hdc_not_void: hdc /= Void
			hdc_exists: hdc.exists

	refresh_now
			-- Refresh now.
			-- (from EV_WIDGET_IMP)
		require -- from  EV_WIDGET_I
			True
	
feature -- Basic operation

	internal_set_minimum_height (value: INTEGER_32)
			-- Make value the new `minimum_height` of Current.
			-- Should check if the user didn't set the minimum width
			-- before to set the new value.
			-- (from EV_SIZEABLE_IMP)
		require -- from EV_SIZEABLE_IMP
			positive_value: value >= 0

	internal_set_minimum_size (mw, mh: INTEGER_32)
			-- Make mw the new minimum_width and mh the new
			-- minimum_height of Current.
			-- Should check if the user didn't set the minimum width
			-- before to set the new value.
			-- (from EV_SIZEABLE_IMP)
		require -- from EV_SIZEABLE_IMP
			positive_mw: mw >= 0
			positive_mh: mh >= 0

	internal_set_minimum_width (value: INTEGER_32)
			-- Make value the new `minimum_width` of Current.
			-- Should check if the user didn't set the minimum width
			-- before to set the new value.
			-- (from EV_SIZEABLE_IMP)
		require -- from EV_SIZEABLE_IMP
			positive_value: value >= 0

	internal_set_size (mw, mh: INTEGER_32)
			-- Set size of `child_cell`.
			-- (from EV_SIZEABLE_IMP)
		require -- from EV_SIZEABLE_IMP
			positive_mw: mw >= 0
			positive_mh: mh >= 0

	parent_ask_resize (a_width, a_height: INTEGER_32)
			-- Called by the parent when the size of Current has to be
			-- changed to a_width, a_height.
			-- (from EV_SIZEABLE_IMP)
		require -- from EV_SIZEABLE_IMP
			not_is_destroyed: not is_destroyed

	paste (index: INTEGER_32)
			-- Insert string which is in Clipboard at
			-- index postion in text.
			-- If Clipboard is empty, it does nothing.
			-- (from EV_TEXT_COMPONENT_IMP)
		require -- from EV_TEXT_COMPONENT_I
			index_large_enough: index >= 1
			index_small_enough: index <= text_length + 1
			is_editable: is_editable

	scroll_to_line (i: INTEGER_32)
			-- Ensure that line i is visible in Current.
			-- (from EV_TEXT_IMP)
		require -- from EV_TEXT_I
			valid_line_index: valid_line_index (i)

	search (str: READABLE_STRING_GENERAL; start: INTEGER_32): INTEGER_32
			-- Position of first occurrence of str at or after start;
			-- 0 if none.
			-- (from EV_TEXT_I)
		require -- from EV_TEXT_I
			valid_string: str /= Void

	select_all
			-- Select all the text of Current.
			-- (from EV_TEXT_COMPONENT_I)
		require -- from WEL_EDIT
			exists: exists
			positive_length: wel_text_length > 0
		require -- from EV_TEXT_COMPONENT_I
			positive_length: text_length > 0
		ensure -- from WEL_EDIT
			has_selection: has_selection
			selection_start_set: wel_selection_start = 0
			selection_end_set: wel_selection_end <= wel_text_length
		ensure -- from EV_TEXT_COMPONENT_I
			has_selection: has_selection
			selection_start_set: start_selection = 1
			selection_end_set: end_selection = text_length + 1

	select_region (start_pos, end_pos: INTEGER_32)
			-- Select (hilight) text between
			-- 'start_pos' and 'end_pos'
			-- (from EV_TEXT_COMPONENT_IMP)
		require -- from EV_TEXT_COMPONENT_I
			valid_start_character_position: start_pos >= 1 and start_pos <= text_length
			valid_end_character_position: end_pos >= 1 and end_pos <= text_length
		ensure -- from EV_TEXT_COMPONENT_I
			has_selection: has_selection
			selection_set: (start_pos <= end_pos implies start_selection = start_pos and end_selection = end_pos + 1) or start_selection = end_pos and end_selection = start_pos + 1

	set_move_and_size (a_x_position, a_y_position, a_width, a_height: INTEGER_32)
			-- Move and resize the widget. Only the parent can call this feature
			-- because it doesn't notify the parent of the change.
			-- Equivalent of `parent_ask_resize` with move.
			-- (from EV_SIZEABLE_IMP)
		require -- from EV_SIZEABLE_IMP
			not_is_destroyed: not is_destroyed

	set_selection (a_start_pos, a_end_pos: INTEGER_32)
			-- Select (highlight) the characters between valid caret positions a_start_pos and a_end_pos.
			-- (from EV_TEXT_COMPONENT_IMP)
		require -- from EV_TEXT_COMPONENT_I
			valid_start: a_start_pos > 0 and a_start_pos <= text_length + 1
			valid_end: a_end_pos > 0 and a_end_pos <= text_length + 1
		ensure -- from EV_TEXT_COMPONENT_I
			selection_set: a_start_pos /= a_end_pos = has_selection
	
feature -- Basic window types

	Ws_child: INTEGER_32 = 1073741824
			-- Declared in Windows as WS_CHILD
			-- (from WEL_WS_CONSTANTS)

	Ws_overlapped: INTEGER_32 = 0
			-- Declared in Windows as WS_OVERLAPPED
			-- Was declared in {WEL_WS_CONSTANTS} as synonym of `ws_tiled`.
			-- (from WEL_WS_CONSTANTS)

	Ws_popup: INTEGER_32 = -2147483648
			-- Declared in Windows as WS_POPUP
			-- (from WEL_WS_CONSTANTS)

	Ws_tiled: INTEGER_32 = 0
			-- Declared in Windows as WS_OVERLAPPED
			-- Was declared in {WEL_WS_CONSTANTS} as synonym of `ws_overlapped`.
			-- (from WEL_WS_CONSTANTS)
	
feature -- Clipping styles

	Ws_clipchildren: INTEGER_32 = 33554432
			-- Declared in Windows as WS_CLIPCHILDREN
			-- (from WEL_WS_CONSTANTS)

	Ws_clipsiblings: INTEGER_32 = 67108864
			-- Declared in Windows as WS_CLIPSIBLINGS
			-- (from WEL_WS_CONSTANTS)
	
feature -- Common window styles

	Ws_childwindow: INTEGER_32 = 1073741824
			-- Declared in Windows as WS_CHILDWINDOW
			-- (from WEL_WS_CONSTANTS)

	Ws_overlappedwindow: INTEGER_32 = 13565952
			-- Declared in Windows as WS_OVERLAPPEDWINDOW
			-- Was declared in {WEL_WS_CONSTANTS} as synonym of `ws_tiledwindow`.
			-- (from WEL_WS_CONSTANTS)

	Ws_popupwindow: INTEGER_32 = -2138570752
			-- Declared in Windows as WS_POPUPWINDOW
			-- (from WEL_WS_CONSTANTS)

	Ws_tiledwindow: INTEGER_32 = 13565952
			-- Declared in Windows as WS_OVERLAPPEDWINDOW
			-- Was declared in {WEL_WS_CONSTANTS} as synonym of `ws_overlappedwindow`.
			-- (from WEL_WS_CONSTANTS)
	
feature -- Constants

	Esb_disable_both: INTEGER_32 = 3
			-- Disables both arrows on a scroll bar.
			-- (from WEL_ESB_CONSTANTS)

	Esb_disable_down: INTEGER_32 = 2
			-- Disables the down arrow on a vertical scroll bar.
			-- (from WEL_ESB_CONSTANTS)

	Esb_disable_left: INTEGER_32 = 1
			-- Disables the left arrow on a horizontal scroll bar.
			-- (from WEL_ESB_CONSTANTS)

	Esb_disable_ltup: INTEGER_32 = 1
			-- Disables the left arrow on a horizontal scroll bar 
			-- or the up arrow on a vertical scroll bar.
			-- (from WEL_ESB_CONSTANTS)

	Esb_disable_rtdn: INTEGER_32 = 2
			-- Disables the right arrow on a horizontal scroll bar 
			-- or the down arrow on a vertical scroll bar.
			-- (from WEL_ESB_CONSTANTS)

	Esb_disable_up: INTEGER_32 = 1
			-- Disables the up arrow on a vertical scroll bar.
			-- (from WEL_ESB_CONSTANTS)

	Esb_enable_both: INTEGER_32 = 0
			-- Enables both arrows on a scroll bar.
			-- (from WEL_ESB_CONSTANTS)

	Family_modern: INTEGER_32 = 5
			-- (from EV_FONT_CONSTANTS)

	Family_roman: INTEGER_32 = 2
			-- (from EV_FONT_CONSTANTS)

	Family_sans: INTEGER_32 = 3
			-- (from EV_FONT_CONSTANTS)

	Family_screen: INTEGER_32 = 1
			-- (from EV_FONT_CONSTANTS)

	Family_typewriter: INTEGER_32 = 4
			-- (from EV_FONT_CONSTANTS)

	Key_0: INTEGER_32 = 1
			-- (from EV_KEY_CONSTANTS)

	Key_1: INTEGER_32 = 2
			-- (from EV_KEY_CONSTANTS)

	Key_2: INTEGER_32 = 3
			-- (from EV_KEY_CONSTANTS)

	Key_3: INTEGER_32 = 4
			-- (from EV_KEY_CONSTANTS)

	Key_4: INTEGER_32 = 5
			-- (from EV_KEY_CONSTANTS)

	Key_5: INTEGER_32 = 6
			-- (from EV_KEY_CONSTANTS)

	Key_6: INTEGER_32 = 7
			-- (from EV_KEY_CONSTANTS)

	Key_7: INTEGER_32 = 8
			-- (from EV_KEY_CONSTANTS)

	Key_8: INTEGER_32 = 9
			-- (from EV_KEY_CONSTANTS)

	Key_9: INTEGER_32 = 10
			-- (from EV_KEY_CONSTANTS)

	Key_a: INTEGER_32 = 68
			-- (from EV_KEY_CONSTANTS)

	Key_alt: INTEGER_32 = 96
			-- (from EV_KEY_CONSTANTS)

	Key_b: INTEGER_32 = 69
			-- (from EV_KEY_CONSTANTS)

	Key_back_space: INTEGER_32 = 40
			-- (from EV_KEY_CONSTANTS)

	Key_backquote: INTEGER_32 = 56
			-- (from EV_KEY_CONSTANTS)

	Key_backslash: INTEGER_32 = 54
			-- (from EV_KEY_CONSTANTS)

	Key_c: INTEGER_32 = 70
			-- (from EV_KEY_CONSTANTS)

	Key_caps_lock: INTEGER_32 = 45
			-- (from EV_KEY_CONSTANTS)

	Key_close_bracket: INTEGER_32 = 52
			-- (from EV_KEY_CONSTANTS)

	Key_comma: INTEGER_32 = 47
			-- (from EV_KEY_CONSTANTS)

	Key_ctrl: INTEGER_32 = 95
			-- (from EV_KEY_CONSTANTS)

	Key_d: INTEGER_32 = 71
			-- (from EV_KEY_CONSTANTS)

	Key_dash: INTEGER_32 = 57
			-- (from EV_KEY_CONSTANTS)

	Key_delete: INTEGER_32 = 67
			-- (from EV_KEY_CONSTANTS)

	Key_down_arrow: INTEGER_32 = 59
			-- (from EV_KEY_CONSTANTS)

	Key_e: INTEGER_32 = 72
			-- (from EV_KEY_CONSTANTS)

	Key_end: INTEGER_32 = 65
			-- (from EV_KEY_CONSTANTS)

	Key_enter: INTEGER_32 = 41
			-- (from EV_KEY_CONSTANTS)

	Key_equal: INTEGER_32 = 48
			-- (from EV_KEY_CONSTANTS)

	Key_escape: INTEGER_32 = 42
			-- (from EV_KEY_CONSTANTS)

	Key_f: INTEGER_32 = 73
			-- (from EV_KEY_CONSTANTS)

	Key_f1: INTEGER_32 = 27
			-- (from EV_KEY_CONSTANTS)

	Key_f10: INTEGER_32 = 36
			-- (from EV_KEY_CONSTANTS)

	Key_f11: INTEGER_32 = 37
			-- (from EV_KEY_CONSTANTS)

	Key_f12: INTEGER_32 = 38
			-- (from EV_KEY_CONSTANTS)

	Key_f2: INTEGER_32 = 28
			-- (from EV_KEY_CONSTANTS)

	Key_f3: INTEGER_32 = 29
			-- (from EV_KEY_CONSTANTS)

	Key_f4: INTEGER_32 = 30
			-- (from EV_KEY_CONSTANTS)

	Key_f5: INTEGER_32 = 31
			-- (from EV_KEY_CONSTANTS)

	Key_f6: INTEGER_32 = 32
			-- (from EV_KEY_CONSTANTS)

	Key_f7: INTEGER_32 = 33
			-- (from EV_KEY_CONSTANTS)

	Key_f8: INTEGER_32 = 34
			-- (from EV_KEY_CONSTANTS)

	Key_f9: INTEGER_32 = 35
			-- (from EV_KEY_CONSTANTS)

	Key_g: INTEGER_32 = 74
			-- (from EV_KEY_CONSTANTS)

	Key_h: INTEGER_32 = 75
			-- (from EV_KEY_CONSTANTS)

	Key_home: INTEGER_32 = 64
			-- (from EV_KEY_CONSTANTS)

	Key_i: INTEGER_32 = 76
			-- (from EV_KEY_CONSTANTS)

	Key_insert: INTEGER_32 = 66
			-- (from EV_KEY_CONSTANTS)

	Key_j: INTEGER_32 = 77
			-- (from EV_KEY_CONSTANTS)

	Key_k: INTEGER_32 = 78
			-- (from EV_KEY_CONSTANTS)

	Key_l: INTEGER_32 = 79
			-- (from EV_KEY_CONSTANTS)

	Key_left: INTEGER_32 = 60
			-- (from EV_KEY_CONSTANTS)

	Key_left_meta: INTEGER_32 = 97
			-- (from EV_KEY_CONSTANTS)

	Key_m: INTEGER_32 = 80
			-- (from EV_KEY_CONSTANTS)

	Key_menu: INTEGER_32 = 99
			-- (from EV_KEY_CONSTANTS)

	Key_n: INTEGER_32 = 81
			-- (from EV_KEY_CONSTANTS)

	Key_num_lock: INTEGER_32 = 24
			-- (from EV_KEY_CONSTANTS)

	Key_numpad_0: INTEGER_32 = 11
			-- (from EV_KEY_CONSTANTS)

	Key_numpad_1: INTEGER_32 = 12
			-- (from EV_KEY_CONSTANTS)

	Key_numpad_2: INTEGER_32 = 13
			-- (from EV_KEY_CONSTANTS)

	Key_numpad_3: INTEGER_32 = 14
			-- (from EV_KEY_CONSTANTS)

	Key_numpad_4: INTEGER_32 = 15
			-- (from EV_KEY_CONSTANTS)

	Key_numpad_5: INTEGER_32 = 16
			-- (from EV_KEY_CONSTANTS)

	Key_numpad_6: INTEGER_32 = 17
			-- (from EV_KEY_CONSTANTS)

	Key_numpad_7: INTEGER_32 = 18
			-- (from EV_KEY_CONSTANTS)

	Key_numpad_8: INTEGER_32 = 19
			-- (from EV_KEY_CONSTANTS)

	Key_numpad_9: INTEGER_32 = 20
			-- (from EV_KEY_CONSTANTS)

	Key_numpad_add: INTEGER_32 = 21
			-- (from EV_KEY_CONSTANTS)

	Key_numpad_decimal: INTEGER_32 = 26
			-- (from EV_KEY_CONSTANTS)

	Key_numpad_divide: INTEGER_32 = 22
			-- (from EV_KEY_CONSTANTS)

	Key_numpad_multiply: INTEGER_32 = 23
			-- (from EV_KEY_CONSTANTS)

	Key_numpad_subtract: INTEGER_32 = 25
			-- (from EV_KEY_CONSTANTS)

	Key_o: INTEGER_32 = 82
			-- (from EV_KEY_CONSTANTS)

	Key_open_bracket: INTEGER_32 = 51
			-- (from EV_KEY_CONSTANTS)

	Key_p: INTEGER_32 = 83
			-- (from EV_KEY_CONSTANTS)

	Key_page_down: INTEGER_32 = 63
			-- (from EV_KEY_CONSTANTS)

	Key_page_up: INTEGER_32 = 62
			-- (from EV_KEY_CONSTANTS)

	Key_pause: INTEGER_32 = 44
			-- (from EV_KEY_CONSTANTS)

	Key_period: INTEGER_32 = 49
			-- (from EV_KEY_CONSTANTS)

	Key_q: INTEGER_32 = 84
			-- (from EV_KEY_CONSTANTS)

	Key_quote: INTEGER_32 = 55
			-- (from EV_KEY_CONSTANTS)

	Key_r: INTEGER_32 = 85
			-- (from EV_KEY_CONSTANTS)

	Key_right: INTEGER_32 = 61
			-- (from EV_KEY_CONSTANTS)

	Key_right_meta: INTEGER_32 = 98
			-- (from EV_KEY_CONSTANTS)

	Key_s: INTEGER_32 = 86
			-- (from EV_KEY_CONSTANTS)

	Key_scroll_lock: INTEGER_32 = 46
			-- (from EV_KEY_CONSTANTS)

	Key_semicolon: INTEGER_32 = 50
			-- (from EV_KEY_CONSTANTS)

	Key_shift: INTEGER_32 = 94
			-- (from EV_KEY_CONSTANTS)

	Key_slash: INTEGER_32 = 53
			-- (from EV_KEY_CONSTANTS)

	Key_space: INTEGER_32 = 39
			-- (from EV_KEY_CONSTANTS)

	Key_t: INTEGER_32 = 87
			-- (from EV_KEY_CONSTANTS)

	Key_tab: INTEGER_32 = 43
			-- (from EV_KEY_CONSTANTS)

	Key_u: INTEGER_32 = 88
			-- (from EV_KEY_CONSTANTS)

	Key_up_arrow: INTEGER_32 = 58
			-- (from EV_KEY_CONSTANTS)

	Key_v: INTEGER_32 = 89
			-- (from EV_KEY_CONSTANTS)

	Key_w: INTEGER_32 = 90
			-- (from EV_KEY_CONSTANTS)

	Key_x: INTEGER_32 = 91
			-- (from EV_KEY_CONSTANTS)

	Key_y: INTEGER_32 = 92
			-- (from EV_KEY_CONSTANTS)

	Key_z: INTEGER_32 = 93
			-- (from EV_KEY_CONSTANTS)

	Shape_italic: INTEGER_32 = 11
			-- (from EV_FONT_CONSTANTS)

	Shape_regular: INTEGER_32 = 10
			-- (from EV_FONT_CONSTANTS)

	Weight_black: INTEGER_32 = 9
			-- (from EV_FONT_CONSTANTS)

	Weight_bold: INTEGER_32 = 8
			-- (from EV_FONT_CONSTANTS)

	Weight_regular: INTEGER_32 = 7
			-- (from EV_FONT_CONSTANTS)

	Weight_thin: INTEGER_32 = 6
			-- (from EV_FONT_CONSTANTS)
	
feature -- Contract support

	valid_family (a_family: INTEGER_32): BOOLEAN
			-- Is a_family a valid family value.
			-- (from EV_FONT_CONSTANTS)

	valid_key_code (a_code: INTEGER_32): BOOLEAN
			-- Is a_code a valid key code?
			-- (from EV_KEY_CONSTANTS)

	valid_shape (a_shape: INTEGER_32): BOOLEAN
			-- Is a_shape a valid shape value.
			-- (from EV_FONT_CONSTANTS)

	valid_weight (a_weight: INTEGER_32): BOOLEAN
			-- Is a_weight a valid weight value.
			-- (from EV_FONT_CONSTANTS)

	valid_wel_code (a_wel_code: INTEGER_32): BOOLEAN
			-- Is a_wel_code valid?
			-- (from EV_WEL_KEY_CONVERSION)
	
feature -- Control window styles

	Ws_group: INTEGER_32 = 131072
			-- Declared in Windows as WS_GROUP
			-- (from WEL_WS_CONSTANTS)

	Ws_tabstop: INTEGER_32 = 65536
			-- Declared in Windows as WS_TABSTOP
			-- (from WEL_WS_CONSTANTS)
	
feature -- Conversion from Eiffel to Windows

	frozen to_lparam (i: INTEGER_32): POINTER
			-- Convert integer value i in a valid LPARAM value.
			-- (from WEL_DATA_TYPE)
		ensure -- from WEL_DATA_TYPE
			is_class: class

	frozen to_lresult (i: INTEGER_32): POINTER
			-- Convert integer value i in a valid LRESULT value.
			-- (from WEL_DATA_TYPE)
		ensure -- from WEL_DATA_TYPE
			is_class: class

	frozen to_wparam (i: INTEGER_32): POINTER
			-- Convert integer value i in a valid WPARAM value.
			-- (from WEL_DATA_TYPE)
		ensure -- from WEL_DATA_TYPE
			is_class: class
	
feature -- Deferred features

	background_color_internal: EV_COLOR
			-- Color used for the background of Current.
			-- This has been redefined as the background color of
			-- text components is white, or Color_read_write by default.
			-- (from EV_TEXT_COMPONENT_IMP)
		require -- from  EV_COLORIZABLE_I
			True

	has_tabstop: BOOLEAN
			-- Does Current exhibit all attributes to permit it to receive the
			-- focus while tabbing?
			-- (from EV_WIDGET_IMP)

	next_dlgtabitem (hdlg, hctl: POINTER; previous: BOOLEAN): POINTER
			-- Encapsulation of the SDK GetNextDlgTabItem,
			-- because we cannot do a deferred feature become an
			-- external feature.
			-- (from EV_WIDGET_IMP)

	next_tabstop_widget (start_widget: EV_WIDGET; search_pos: INTEGER_32; forwards: BOOLEAN): EV_WIDGET_IMP
			-- Return the next widget that may by tabbed to as a result of pressing the tab key from start_widget.
			-- search_pos is the index where searching must start from for containers, and forwards determines the
			-- tabbing direction. If search_pos is less then 1 or more than `count` for containers, the parent of the
			-- container must be searched next.
			-- (from EV_WIDGET_IMP)
		require -- from EV_WIDGET_IMP
			start_widget_not_void: start_widget /= Void
		ensure -- from EV_WIDGET_IMP
			result_not_void: Result /= Void

	next_tabstop_widget_from_parent (start_widget: EV_WIDGET; search_pos: INTEGER_32; forwards: BOOLEAN): EV_WIDGET_IMP
			-- Return the next widget that may be tabbed to as a result of pressing the tab key from start_widget
			-- by visiting the parent of Current with a search index determined by search_pos and forwards.
			-- (from EV_WIDGET_IMP)
		require -- from EV_WIDGET_IMP
			start_widget_not_void: start_widget /= Void
		ensure -- from EV_WIDGET_IMP
			result_not_void: Result /= Void

	on_size (size_type, a_width, a_height: INTEGER_32)
			-- Current has been resized.
			-- (from EV_WIDGET_IMP)
		require -- from WEL_WINDOW
			exists: exists
		require -- from EV_WIDGET_IMP
			exists: exists

	return_current_if_next_tabstop_widget (start_widget: EV_WIDGET; search_pos: INTEGER_32; forwards: BOOLEAN): detachable EV_WIDGET_IMP
			-- If Current is not equal to start_widget then return Current but only if search_pos is 1 and forwards or
			-- search_pos is 0 and not `forwards. This ensures that we return a container in the correct order (before or after)
			-- its children dependent on the state of forwards.
			-- (from EV_WIDGET_IMP)
		require -- from EV_WIDGET_IMP
			start_widget_not_void: start_widget /= Void

	Start_widget_searched_cell: CELL [INTEGER_32]
			-- A cell to hold the seach index that the item tabbed from started with.
			-- This is necessary to prevent infinite recursion in the
			-- case where there is no next item as if we return to the
			-- original widget with the same search position, then we know we have exhausted all other possibilities.
			-- (from EV_WIDGET_IMP)

	frozen trigger_dpi_actions (a_dpi: NATURAL_32; a_width, a_height: INTEGER_32)
			-- Current has been resized.
			-- (from EV_WIDGET_IMP)
		require -- from EV_WIDGET_IMP
			exists: exists

	frozen trigger_resize_actions (a_width, a_height: INTEGER_32)
			-- Current has been resized.
			-- (from EV_WIDGET_IMP)
		require -- from EV_WIDGET_IMP
			exists: exists

	wel_background_color: WEL_COLOR_REF
			-- Result is background color of Current.
			-- (from EV_TEXT_COMPONENT_IMP)
		require -- from WEL_COLOR_CONTROL
			exists: exists
		require -- from  EV_WIDGET_IMP
			True
		ensure -- from WEL_COLOR_CONTROL
			background_color_not_void: Result /= Void

	wel_foreground_color: WEL_COLOR_REF
			-- Result is foreground color of Current.
			-- (from EV_TEXT_COMPONENT_IMP)
		require -- from WEL_COLOR_CONTROL
			exists: exists
		require -- from  EV_WIDGET_IMP
			True
		ensure -- from WEL_COLOR_CONTROL
			foreground_color_not_void: Result /= Void
	
feature -- Element Change

	set_default_processing (value: BOOLEAN)
			-- Enable or disable default processing of window messages.
			-- (from WEL_RETURN_VALUE)
		ensure -- from WEL_RETURN_VALUE
			value_set: default_processing = value

	set_message_return_value (value: POINTER)
			-- Set the window-procedure-return-value.
			-- (from WEL_RETURN_VALUE)
		require -- from  EV_WIDGET_IMP
			True
		ensure -- from WEL_RETURN_VALUE
			has_return_value: has_return_value
			value_set: message_return_value = value
	
feature -- Event handling

	caret_move_actions: EV_INTEGER_ACTION_SEQUENCE
			-- Actions to be performed when caret position changes.
			-- (from EV_RICH_TEXT_ACTION_SEQUENCES_I)
		ensure -- from EV_RICH_TEXT_ACTION_SEQUENCES_I
			not_void: Result /= Void

	change_actions: EV_NOTIFY_ACTION_SEQUENCE
			-- Actions to be performed when `text` changes.
			-- (from EV_TEXT_COMPONENT_ACTION_SEQUENCES_I)
		ensure -- from EV_TEXT_COMPONENT_ACTION_SEQUENCES_I
			not_void: Result /= Void

	conforming_pick_actions: EV_NOTIFY_ACTION_SEQUENCE
			-- Actions to be performed when a pebble that fits here is picked.
			-- (from EV_PICK_AND_DROPABLE_ACTION_SEQUENCES_I)
		ensure -- from EV_PICK_AND_DROPABLE_ACTION_SEQUENCES_I
			not_void: Result /= Void

	dock_ended_actions: EV_NOTIFY_ACTION_SEQUENCE
			-- Actions to be performed after a dock completes from Current.
			-- Either to a dockable target or a dockable dialog.
			-- (from EV_DOCKABLE_SOURCE_ACTION_SEQUENCES_I)
		ensure -- from EV_DOCKABLE_SOURCE_ACTION_SEQUENCES_I
			not_void: Result /= Void

	dock_started_actions: EV_NOTIFY_ACTION_SEQUENCE
			-- Actions to be performed when `pebble` is picked up.
			-- (from EV_DOCKABLE_SOURCE_ACTION_SEQUENCES_I)
		ensure -- from EV_DOCKABLE_SOURCE_ACTION_SEQUENCES_I
			not_void: Result /= Void

	dpi_changed_actions: EV_DPI_ACTION_SEQUENCE
			-- Actions to be performed when dpi changes.
			-- (from EV_WIDGET_ACTION_SEQUENCES_I)
		ensure -- from EV_WIDGET_ACTION_SEQUENCES_I
			not_void: Result /= Void

	drop_actions: EV_PND_ACTION_SEQUENCE
			-- Actions to be performed when a pebble is dropped here.
			-- (from EV_PICK_AND_DROPABLE_ACTION_SEQUENCES_I)
		ensure -- from EV_PICK_AND_DROPABLE_ACTION_SEQUENCES_I
			not_void: Result /= Void

	file_access_actions: EV_INTEGER_ACTION_SEQUENCE
			-- Actions to be performed while loading or saving.
			-- Event data is percentage of file written (0-100).
			-- (from EV_RICH_TEXT_ACTION_SEQUENCES_I)
		ensure -- from EV_RICH_TEXT_ACTION_SEQUENCES_I
			not_void: Result /= Void

	file_drop_actions: EV_LITE_ACTION_SEQUENCE [LIST [STRING_32]]
			-- Actions to be performed when an OS file drop occurs on Current.
			-- (from EV_WIDGET_ACTION_SEQUENCES_I)
		ensure -- from EV_WIDGET_ACTION_SEQUENCES_I
			not_void: Result /= Void

	focus_in_actions: EV_NOTIFY_ACTION_SEQUENCE
			-- Actions to be performed when keyboard focus is gained.
			-- (from EV_WIDGET_ACTION_SEQUENCES_I)
		ensure -- from EV_WIDGET_ACTION_SEQUENCES_I
			not_void: Result /= Void

	focus_out_actions: EV_NOTIFY_ACTION_SEQUENCE
			-- Actions to be performed when keyboard focus is lost.
			-- (from EV_WIDGET_ACTION_SEQUENCES_I)
		ensure -- from EV_WIDGET_ACTION_SEQUENCES_I
			not_void: Result /= Void

	init_dpi_changed_actions (a_dpi_changed_actions: like dpi_changed_actions)
			-- Initialize a_dpi_changed_actions accordingly to the current widget.
			-- (from EV_WIDGET_IMP)
		require -- from  EV_WIDGET_ACTION_SEQUENCES_I
			True

	init_file_drop_actions (a_file_drop_actions: like file_drop_actions)
			-- Create and initialize
			-- (from EV_WIDGET_IMP)
		require -- from  EV_WIDGET_ACTION_SEQUENCES_I
			True

	init_resize_actions (a_resize_actions: like resize_actions)
			-- Initialize a_resize_actions accordingly to the current widget.
			-- (from EV_WIDGET_IMP)
		require -- from  EV_WIDGET_ACTION_SEQUENCES_I
			True

	key_press_actions: EV_KEY_ACTION_SEQUENCE
			-- Actions to be performed when a keyboard key is pressed.
			-- (from EV_WIDGET_ACTION_SEQUENCES_I)
		ensure -- from EV_WIDGET_ACTION_SEQUENCES_I
			not_void: Result /= Void

	key_press_string_actions: EV_KEY_STRING_ACTION_SEQUENCE
			-- Actions to be performed when a keyboard press generates a displayable character.
			-- (from EV_WIDGET_ACTION_SEQUENCES_I)
		ensure -- from EV_WIDGET_ACTION_SEQUENCES_I
			not_void: Result /= Void

	key_release_actions: EV_KEY_ACTION_SEQUENCE
			-- Actions to be performed when a keyboard key is released.
			-- (from EV_WIDGET_ACTION_SEQUENCES_I)
		ensure -- from EV_WIDGET_ACTION_SEQUENCES_I
			not_void: Result /= Void

	mouse_wheel_actions: EV_INTEGER_ACTION_SEQUENCE
			-- Actions to be performed when mouse wheel is rotated.
			-- (from EV_WIDGET_ACTION_SEQUENCES_I)
		ensure -- from EV_WIDGET_ACTION_SEQUENCES_I
			not_void: Result /= Void

	pick_actions: EV_PND_START_ACTION_SEQUENCE
			-- Actions to be performed when `pebble` is picked up.
			-- (from EV_PICK_AND_DROPABLE_ACTION_SEQUENCES_I)
		ensure -- from EV_PICK_AND_DROPABLE_ACTION_SEQUENCES_I
			not_void: Result /= Void

	pick_ended_actions: EV_PND_FINISHED_ACTION_SEQUENCE
			-- Actions to be performed when a transport from Current ends.
			-- (from EV_PICK_AND_DROPABLE_ACTION_SEQUENCES_I)
		ensure -- from EV_PICK_AND_DROPABLE_ACTION_SEQUENCES_I
			not_void: Result /= Void

	pointer_button_press_actions: EV_POINTER_BUTTON_ACTION_SEQUENCE
			-- Actions to be performed when screen pointer button is pressed.
			-- (from EV_WIDGET_ACTION_SEQUENCES_I)
		ensure -- from EV_WIDGET_ACTION_SEQUENCES_I
			not_void: Result /= Void

	pointer_button_release_actions: EV_POINTER_BUTTON_ACTION_SEQUENCE
			-- Actions to be performed when screen pointer button is released.
			-- (from EV_WIDGET_ACTION_SEQUENCES_I)
		ensure -- from EV_WIDGET_ACTION_SEQUENCES_I
			not_void: Result /= Void

	pointer_double_press_actions: EV_POINTER_BUTTON_ACTION_SEQUENCE
			-- Actions to be performed when screen pointer is double clicked.
			-- (from EV_WIDGET_ACTION_SEQUENCES_I)
		ensure -- from EV_WIDGET_ACTION_SEQUENCES_I
			not_void: Result /= Void

	pointer_enter_actions: EV_NOTIFY_ACTION_SEQUENCE
			-- Actions to be performed when screen pointer enters widget.
			-- (from EV_WIDGET_ACTION_SEQUENCES_I)
		ensure -- from EV_WIDGET_ACTION_SEQUENCES_I
			not_void: Result /= Void

	pointer_leave_actions: EV_NOTIFY_ACTION_SEQUENCE
			-- Actions to be performed when screen pointer leaves widget.
			-- (from EV_WIDGET_ACTION_SEQUENCES_I)
		ensure -- from EV_WIDGET_ACTION_SEQUENCES_I
			not_void: Result /= Void

	pointer_motion_actions: EV_POINTER_MOTION_ACTION_SEQUENCE
			-- Actions to be performed when screen pointer moves.
			-- (from EV_WIDGET_ACTION_SEQUENCES_I)
		ensure -- from EV_WIDGET_ACTION_SEQUENCES_I
			not_void: Result /= Void

	resize_actions: EV_GEOMETRY_ACTION_SEQUENCE
			-- Actions to be performed when size changes.
			-- (from EV_WIDGET_ACTION_SEQUENCES_I)
		ensure -- from EV_WIDGET_ACTION_SEQUENCES_I
			not_void: Result /= Void

	selection_change_actions: EV_NOTIFY_ACTION_SEQUENCE
			-- Actions to be performed when selection changes.
			-- (from EV_RICH_TEXT_ACTION_SEQUENCES_I)
		ensure -- from EV_RICH_TEXT_ACTION_SEQUENCES_I
			not_void: Result /= Void
	
feature -- Extended window styles

	Ws_ex_acceptfiles: INTEGER_32 = 16
			-- Declared in Windows as WS_EX_ACCEPTFILES
			-- (from WEL_WS_CONSTANTS)

	Ws_ex_appwindow: INTEGER_32 = 262144
			-- (from WEL_WS_CONSTANTS)

	Ws_ex_clientedge: INTEGER_32 = 512
			-- Declared in Windows as WS_EX_CLIENTEDGE
			-- (from WEL_WS_CONSTANTS)

	Ws_ex_composited: INTEGER_32 = 33554432
			-- Declared in Windows as WS_EX_COMPOSITED
			-- (from WEL_WS_CONSTANTS)

	Ws_ex_contexthelp: INTEGER_32 = 1024
			-- Declared in Windows as WS_EX_CONTEXTHELP
			-- (from WEL_WS_CONSTANTS)

	Ws_ex_controlparent: INTEGER_32 = 65536
			-- Declared in Windows as WS_EX_CONTROLPARENT
			-- (from WEL_WS_CONSTANTS)

	Ws_ex_dlgmodalframe: INTEGER_32 = 1
			-- Declared in Windows as WS_EX_DLGMODALFRAME
			-- (from WEL_WS_CONSTANTS)

	Ws_ex_layered: INTEGER_32 = 524288
			-- Declared in Windows as WS_EX_LAYERED
			-- (from WEL_WS_CONSTANTS)

	Ws_ex_left: INTEGER_32 = 0
			-- Declared in Windows as WS_EX_LEFT
			-- (from WEL_WS_CONSTANTS)

	Ws_ex_leftscrollbar: INTEGER_32 = 16384
			-- Declared in Windows as WS_EX_LEFTSCROLLBAR
			-- (from WEL_WS_CONSTANTS)

	Ws_ex_ltrreading: INTEGER_32 = 0
			-- Declared in Windows as WS_EX_LTRREADING
			-- (from WEL_WS_CONSTANTS)

	Ws_ex_mdichild: INTEGER_32 = 64
			-- Declared in Windows as WS_EX_MDICHILD
			-- (from WEL_WS_CONSTANTS)

	Ws_ex_noactivate: INTEGER_32 = 134217728
			-- Declared in Windows as WS_EX_NOACTIVATE
			-- (from WEL_WS_CONSTANTS)

	Ws_ex_noparentnotify: INTEGER_32 = 4
			-- Declared in Windows as WS_EX_NOPARENTNOTIFY
			-- (from WEL_WS_CONSTANTS)

	Ws_ex_overlappedwindow: INTEGER_32 = 768
			-- Declared in Windows as WS_EX_OVERLAPPEDWINDOW
			-- (from WEL_WS_CONSTANTS)

	Ws_ex_palettewindow: INTEGER_32 = 392
			-- Declared in Windows as WS_EX_PALETTEWINDOW
			-- (from WEL_WS_CONSTANTS)

	Ws_ex_right: INTEGER_32 = 4096
			-- Declared in Windows as WS_EX_RIGHT
			-- (from WEL_WS_CONSTANTS)

	Ws_ex_rightscrollbar: INTEGER_32 = 0
			-- Declared in Windows as WS_EX_RIGHTSCROLLBAR
			-- (from WEL_WS_CONSTANTS)

	Ws_ex_rtlreading: INTEGER_32 = 8192
			-- Declared in Windows as WS_EX_RTLREADING
			-- (from WEL_WS_CONSTANTS)

	Ws_ex_staticedge: INTEGER_32 = 131072
			-- Declared in Windows as WS_EX_STATICEDGE
			-- (from WEL_WS_CONSTANTS)

	Ws_ex_toolwindow: INTEGER_32 = 128
			-- Declared in Windows as WS_EX_TOOLWINDOW
			-- (from WEL_WS_CONSTANTS)

	Ws_ex_topmost: INTEGER_32 = 8
			-- Declared in Windows as WS_EX_TOPMOST
			-- (from WEL_WS_CONSTANTS)

	Ws_ex_transparent: INTEGER_32 = 32
			-- Declared in Windows as WS_EX_TRANSPARENT
			-- (from WEL_WS_CONSTANTS)

	Ws_ex_windowedge: INTEGER_32 = 256
			-- Declared in Windows as WS_EX_WINDOWEDGE
			-- (from WEL_WS_CONSTANTS)
	
feature -- Externals

	cwin_get_next_dlgtabitem (hdlg, hctl: POINTER; previous: BOOLEAN): POINTER
			-- SDK GetNextDlgTabItem
			-- (from WEL_CONTROL)
		require -- from  EV_WIDGET_IMP
			True

	cwin_show_window (hwnd: POINTER; cmd_show: INTEGER_32)
			-- SDK ShowWindow
			-- (from WEL_WINDOW)
		require -- from  EV_WIDGET_IMP
			True
		ensure -- from EV_WIDGET_IMP
			is_class: class
		ensure -- from WEL_WINDOW
			is_class: class
	
feature -- Feature that should be directly implemented by externals

	show_window (hwnd: POINTER; cmd_show: INTEGER_32)
			-- Encapsulation of the cwin_show_window function of
			-- WEL_WINDOW. Normaly, we should be able to have directly
			-- cwin_show_window deferred but it does not wotk because
			-- it would be implemented by an external.
			-- (from EV_WIDGET_IMP)
	
feature -- For dialogs

	frozen dwlp_dlgproc: INTEGER_32
			-- (from WEL_GWL_CONSTANTS)

	frozen dwlp_msgresult: INTEGER_32
			-- (from WEL_GWL_CONSTANTS)

	frozen dwlp_user: INTEGER_32
			-- (from WEL_GWL_CONSTANTS)
	
feature -- For windows

	Gwl_hinstance: INTEGER_32 = -6
			-- Was declared in {WEL_GWL_CONSTANTS} as synonym of `gwlp_hinstance`.
			-- (from WEL_GWL_CONSTANTS)

	Gwl_hwndparent: INTEGER_32 = -8
			-- Was declared in {WEL_GWL_CONSTANTS} as synonym of `gwlp_hwndparent`.
			-- (from WEL_GWL_CONSTANTS)

	Gwl_id: INTEGER_32 = -12
			-- Was declared in {WEL_GWL_CONSTANTS} as synonym of `gwlp_id`.
			-- (from WEL_GWL_CONSTANTS)

	Gwl_userdata: INTEGER_32 = -21
			-- Was declared in {WEL_GWL_CONSTANTS} as synonym of `gwlp_userdata`.
			-- (from WEL_GWL_CONSTANTS)

	Gwl_wndproc: INTEGER_32 = -4
			-- Was declared in {WEL_GWL_CONSTANTS} as synonym of `gwlp_wndproc`.
			-- (from WEL_GWL_CONSTANTS)

	Gwlp_hinstance: INTEGER_32 = -6
			-- Was declared in {WEL_GWL_CONSTANTS} as synonym of `gwl_hinstance`.
			-- (from WEL_GWL_CONSTANTS)

	Gwlp_hwndparent: INTEGER_32 = -8
			-- Was declared in {WEL_GWL_CONSTANTS} as synonym of `gwl_hwndparent`.
			-- (from WEL_GWL_CONSTANTS)

	Gwlp_id: INTEGER_32 = -12
			-- Was declared in {WEL_GWL_CONSTANTS} as synonym of `gwl_id`.
			-- (from WEL_GWL_CONSTANTS)

	Gwlp_userdata: INTEGER_32 = -21
			-- Was declared in {WEL_GWL_CONSTANTS} as synonym of `gwl_userdata`.
			-- (from WEL_GWL_CONSTANTS)

	Gwlp_wndproc: INTEGER_32 = -4
			-- Was declared in {WEL_GWL_CONSTANTS} as synonym of `gwl_wndproc`.
			-- (from WEL_GWL_CONSTANTS)
	
feature -- Generic window states

	Ws_disabled: INTEGER_32 = 134217728
			-- Declared in Windows as WS_DISABLED
			-- (from WEL_WS_CONSTANTS)

	Ws_visible: INTEGER_32 = 268435456
			-- Declared in Windows as WS_VISIBLE
			-- (from WEL_WS_CONSTANTS)
	
feature -- Main window states

	Ws_iconic: INTEGER_32 = 536870912
			-- Declared in Windows as WS_MINIMIZE
			-- Was declared in {WEL_WS_CONSTANTS} as synonym of `ws_minimize`.
			-- (from WEL_WS_CONSTANTS)

	Ws_maximize: INTEGER_32 = 16777216
			-- Declared in Windows as WS_MAXIMIZE
			-- (from WEL_WS_CONSTANTS)

	Ws_minimize: INTEGER_32 = 536870912
			-- Declared in Windows as WS_MINIMIZE
			-- Was declared in {WEL_WS_CONSTANTS} as synonym of `ws_iconic`.
			-- (from WEL_WS_CONSTANTS)
	
feature -- Main window styles

	Ws_border: INTEGER_32 = 8388608
			-- Declared in Windows as WS_BORDER
			-- (from WEL_WS_CONSTANTS)

	Ws_caption: INTEGER_32 = 12582912
			-- Declared in Windows as WS_CAPTION
			-- (from WEL_WS_CONSTANTS)

	Ws_dlgframe: INTEGER_32 = 4194304
			-- Declared in Windows as WS_DLGFRAME
			-- (from WEL_WS_CONSTANTS)

	Ws_hscroll: INTEGER_32 = 1048576
			-- Declared in Windows as WS_HSCROLL
			-- (from WEL_WS_CONSTANTS)

	Ws_maximizebox: INTEGER_32 = 65536
			-- Declared in Windows as WS_MAXIMIZEBOX
			-- (from WEL_WS_CONSTANTS)

	Ws_minimizebox: INTEGER_32 = 131072
			-- Declared in Windows as WS_MINIMIZEBOX
			-- (from WEL_WS_CONSTANTS)

	Ws_sizebox: INTEGER_32 = 262144
			-- Declared in Windows as WS_THICKFRAME
			-- Was declared in {WEL_WS_CONSTANTS} as synonym of `ws_thickframe`.
			-- (from WEL_WS_CONSTANTS)

	Ws_sysmenu: INTEGER_32 = 524288
			-- Declared in Windows as WS_SYSMENU
			-- (from WEL_WS_CONSTANTS)

	Ws_thickframe: INTEGER_32 = 262144
			-- Declared in Windows as WS_THICKFRAME
			-- Was declared in {WEL_WS_CONSTANTS} as synonym of `ws_sizebox`.
			-- (from WEL_WS_CONSTANTS)

	Ws_vscroll: INTEGER_32 = 2097152
			-- Declared in Windows as WS_VSCROLL
			-- (from WEL_WS_CONSTANTS)
	
feature -- Markers

	fixme (comment: READABLE_STRING_8)
			-- Mark code that has to be "fixed" with comment.
			-- (from REFACTORING_HELPER)
		require -- from REFACTORING_HELPER
			comment_not_void: comment /= Void
		ensure -- from REFACTORING_HELPER
			instance_free: class

	to_implement (comment: READABLE_STRING_8)
			-- Mark code that has to be "implemented" with comment.
			-- (from REFACTORING_HELPER)
		require -- from REFACTORING_HELPER
			comment_not_void: comment /= Void
		ensure -- from REFACTORING_HELPER
			instance_free: class

	to_implement_assertion (comment: READABLE_STRING_8): BOOLEAN
			-- Mark assertion that has to be "implemented" with comment.
			-- (from REFACTORING_HELPER)
		require -- from REFACTORING_HELPER
			comment_not_void: comment /= Void
		ensure -- from REFACTORING_HELPER
			instance_free: class
	
feature -- Navigation

	disable_tabable_from
			-- Ensure `is_tabable_from` is False.
			-- (from EV_PRIMITIVE_IMP)
		require -- from  EV_TAB_CONTROLABLE_I
			True
		ensure -- from EV_TAB_CONTROLABLE_I
			not_is_tabable_from: not is_tabable_from

	disable_tabable_to
			-- Ensure `is_tabable_to` is False.
			-- (from EV_PRIMITIVE_IMP)
		require -- from  EV_TAB_CONTROLABLE_I
			True
		ensure -- from EV_TAB_CONTROLABLE_I
			not_is_tabable_to: not is_tabable_to

	enable_tabable_from
			-- Ensure `is_tabable_from` is True.
			-- (from EV_PRIMITIVE_IMP)
		require -- from  EV_TAB_CONTROLABLE_I
			True
		ensure -- from EV_TAB_CONTROLABLE_I
			is_tabable_from: is_tabable_from

	enable_tabable_to
			-- Ensure `is_tabable_to` is True.
			-- (from EV_PRIMITIVE_IMP)
		require -- from  EV_TAB_CONTROLABLE_I
			True
		ensure -- from EV_TAB_CONTROLABLE_I
			is_tabable_to: is_tabable_to

	is_tabable_from: BOOLEAN
			-- May Current be tabbed from?
			-- (from EV_PRIMITIVE_IMP)
		require -- from  EV_TAB_CONTROLABLE_I
			True
		require -- from  EV_WIDGET_IMP
			True

	is_tabable_to: BOOLEAN
			-- May Current be tabbed to?
			-- (from EV_PRIMITIVE_IMP)
		require -- from  EV_TAB_CONTROLABLE_I
			True
	
feature -- Notifications

	on_en_errspace
			-- Cannot allocate enough memory to
			-- meet a specific request.
			-- (from WEL_EDIT)
		require -- from WEL_EDIT
			exists: exists

	on_en_hscroll
			-- The user click on the horizontal scroll bar.
			-- (from WEL_EDIT)
		require -- from WEL_EDIT
			exists: exists

	on_en_killfocus
			-- Lose the keyboard focus.
			-- (from WEL_EDIT)
		require -- from WEL_EDIT
			exists: exists

	on_en_maxtext
			-- The current text insertion has exceeded
			-- the specified number of characters.
			-- (from WEL_EDIT)
		require -- from WEL_EDIT
			exists: exists

	on_en_msgfilter (a_msg_filter: WEL_MSG_FILTER)
			-- Notfication of a keyboard or mouse event in the control.
			-- Only notfications are sent that are enabled
			-- in the `event_mask`.
			-- Note:
			-- To prevent the Rich Edit Control from handling the message
			-- indicated with a_msg_filter call `ignore_filtered_message`
			-- (from WEL_RICH_EDIT)
		require -- from WEL_RICH_EDIT
			exists: exists
			msg_filter_exists: a_msg_filter /= Void and then a_msg_filter.exists

	on_en_setfocus
			-- Receive the keyboard focus.
			-- (from WEL_EDIT)
		require -- from WEL_EDIT
			exists: exists

	on_en_update
			-- The control is about to display altered text.
			-- (from WEL_EDIT)
		require -- from WEL_EDIT
			exists: exists

	on_en_vscroll
			-- The user click on the vertical scroll bar.
			-- (from WEL_EDIT)
		require -- from WEL_EDIT
			exists: exists
	
feature -- Output

	Io: STD_FILES
			-- Handle to standard file setup
			-- (from ANY)
		ensure -- from ANY
			instance_free: class
			io_not_void: Result /= Void

	out: STRING_8
			-- New string containing terse printable representation
			-- of current object
			-- (from ANY)
		ensure -- from ANY
			out_not_void: Result /= Void

	print (o: detachable ANY)
			-- Write terse external representation of o
			-- on standard output.
			-- (from ANY)
		ensure -- from ANY
			instance_free: class

	frozen tagged_out: STRING_8
			-- New string containing terse printable representation
			-- of current object
			-- (from ANY)
		ensure -- from ANY
			tagged_out_not_void: Result /= Void
	
feature -- Platform

	Operating_environment: OPERATING_ENVIRONMENT
			-- Objects available from the operating system
			-- (from ANY)
		ensure -- from ANY
			instance_free: class
			operating_environment_not_void: Result /= Void
	
feature -- Position

	set_position (new_x_position: INTEGER_32; new_y_position: INTEGER_32)
			-- Put at horizontal position new_x_position and at
			-- vertical position new_y_position relative to parent.
			-- (from EV_SIZEABLE_IMP)
		require -- from EV_SIZEABLE_IMP
			not_is_destroyed: not is_destroyed
	
feature -- Registration

	is_registered: BOOLEAN
			-- Is window registered?
			-- (from WEL_WINDOW)

	frozen register_current_window
			-- Register Current in window manager.
			-- (from WEL_WINDOW)
		ensure -- from WEL_WINDOW
			registered: is_registered
	
feature -- Status Report

	current_line_number: INTEGER_32
			-- Returns the number of the line the cursor currently
			-- is on.
			-- (from EV_TEXT_IMP)
		ensure -- from EV_TEXT_I
			valid_line_index: valid_line_index (Result)

	text_length: INTEGER_32
			-- Number of characters comprising `text`. This is an optimized
			-- version, which only recomputes the length if not `text_up_to_date`.
			-- (from EV_TEXT_IMP)
		require -- from  EV_TEXT_COMPONENT_I
			True
		ensure -- from EV_TEXT_COMPONENT_I
			result_not_negative: Result >= 0
	
feature -- Status Setting

	append_text_for_rtf (a_text: READABLE_STRING_GENERAL; a_format: EV_CHARACTER_FORMAT_I)
			-- Append RTF representation of a_text with format a_format to `internal_text`
			-- and store information required from a_format ready for completion of buffering.
			-- (from EV_RICH_TEXT_BUFFERING_STRUCTURES_I)

	clear_structures
			-- Clear all structures used for buffering into RTF format.
			-- (from EV_RICH_TEXT_BUFFERING_STRUCTURES_I)

	internal_text: STRING_32
			-- Text used for building RTF strings internally before buffering or saving.
			-- (from EV_RICH_TEXT_BUFFERING_STRUCTURES_I)

	rich_text: detachable EV_RICH_TEXT_I
			-- Rich text associated with Current.
			-- (from EV_RICH_TEXT_BUFFERING_STRUCTURES_I)

	set_rich_text (a_rich_text: EV_RICH_TEXT_I)
			-- Assign a_rich_text to `rich_text` and initialize buffering structures.
			-- (from EV_RICH_TEXT_BUFFERING_STRUCTURES_I)
		require -- from EV_RICH_TEXT_BUFFERING_STRUCTURES_I
			a_rich_text_not_void: a_rich_text /= Void
	
feature -- Status Settings

	append_text (txt: READABLE_STRING_GENERAL)
			-- Append txt to end of `text`.
			-- (from EV_TEXT_IMP)
		require -- from EV_TEXT_COMPONENT_I
			valid_text: txt /= Void
		ensure -- from EV_TEXT_COMPONENT_I
			text_appended: 
	
feature -- Tooltip Flag constants

	Ttf_centertip: INTEGER_32 = 2
			-- (from WEL_TOOLTIP_CONSTANTS)

	Ttf_idishwnd: INTEGER_32 = 1
			-- (from WEL_TOOLTIP_CONSTANTS)

	Ttf_rtlreading: INTEGER_32 = 4
			-- (from WEL_TOOLTIP_CONSTANTS)

	Ttf_subclass: INTEGER_32 = 16
			-- (from WEL_TOOLTIP_CONSTANTS)
	
feature -- Tooltip message constants

	ttm_activate: INTEGER_32
			-- (from WEL_TOOLTIP_CONSTANTS)

	ttm_addtool: INTEGER_32
			-- (from WEL_TOOLTIP_CONSTANTS)

	ttm_deltool: INTEGER_32
			-- (from WEL_TOOLTIP_CONSTANTS)

	ttm_enumtools: INTEGER_32
			-- (from WEL_TOOLTIP_CONSTANTS)

	ttm_getcurrenttool: INTEGER_32
			-- (from WEL_TOOLTIP_CONSTANTS)

	ttm_getdelaytime: INTEGER_32
			-- (from WEL_TOOLTIP_CONSTANTS)

	ttm_getmaxtipwidth: INTEGER_32
			-- (from WEL_TOOLTIP_CONSTANTS)

	ttm_gettext: INTEGER_32
			-- (from WEL_TOOLTIP_CONSTANTS)

	ttm_gettipbkcolor: INTEGER_32
			-- (from WEL_TOOLTIP_CONSTANTS)

	ttm_gettiptextcolor: INTEGER_32
			-- (from WEL_TOOLTIP_CONSTANTS)

	ttm_gettoolcount: INTEGER_32
			-- (from WEL_TOOLTIP_CONSTANTS)

	ttm_gettoolinfo: INTEGER_32
			-- (from WEL_TOOLTIP_CONSTANTS)

	ttm_hittest: INTEGER_32
			-- (from WEL_TOOLTIP_CONSTANTS)

	ttm_newtoolrect: INTEGER_32
			-- (from WEL_TOOLTIP_CONSTANTS)

	ttm_relayevent: INTEGER_32
			-- (from WEL_TOOLTIP_CONSTANTS)

	ttm_setdelaytime: INTEGER_32
			-- (from WEL_TOOLTIP_CONSTANTS)

	ttm_setmaxtipwidth: INTEGER_32
			-- (from WEL_TOOLTIP_CONSTANTS)

	ttm_settipbkcolor: INTEGER_32
			-- (from WEL_TOOLTIP_CONSTANTS)

	ttm_settiptextcolor: INTEGER_32
			-- (from WEL_TOOLTIP_CONSTANTS)

	ttm_settoolinfo: INTEGER_32
			-- (from WEL_TOOLTIP_CONSTANTS)

	ttm_updatetiptext: INTEGER_32
			-- (from WEL_TOOLTIP_CONSTANTS)

	ttm_windowfrompoint: INTEGER_32
			-- (from WEL_TOOLTIP_CONSTANTS)
	
feature -- Tooltip style constants

	tts_alwaystip: INTEGER_32
			-- (from WEL_TOOLTIP_CONSTANTS)

	tts_noprefix: INTEGER_32
			-- (from WEL_TOOLTIP_CONSTANTS)
	
feature -- Tooltip time delay constants

	ttdt_automatic: INTEGER_32
			-- (from WEL_TOOLTIP_CONSTANTS)

	ttdt_autopop: INTEGER_32
			-- (from WEL_TOOLTIP_CONSTANTS)

	ttdt_initial: INTEGER_32
			-- (from WEL_TOOLTIP_CONSTANTS)

	ttdt_reshow: INTEGER_32
			-- (from WEL_TOOLTIP_CONSTANTS)
	
feature -- WEL Implementation

	background_brush: detachable WEL_BRUSH
			-- Current window background color used to refresh the window when
			-- requested by the WM_ERASEBKGND windows message.
			-- (from EV_TEXT_IMP)
		require -- from  WEL_WINDOW
			True
		ensure -- from WEL_WINDOW
			new_object: Result /= Void implies Result /= background_brush

	disable
			-- Disable mouse and keyboard input
			-- (from EV_TEXT_IMP)
		require -- from  EV_WIDGET_IMP
			True
		require -- from WEL_WINDOW
			exists: exists
		ensure -- from WEL_WINDOW
			disabled: not is_sensitive

	enable
			-- Enable mouse and keyboard input.
			-- (from EV_TEXT_IMP)
		require -- from  EV_WIDGET_IMP
			True
		require -- from WEL_WINDOW
			exists: exists
		ensure -- from WEL_WINDOW
			enabled: is_sensitive

	on_en_change
			-- `text` has been modified.
			-- (from EV_TEXT_IMP)
		require -- from WEL_EDIT
			exists: exists
	
feature -- element change

	maximum_character_width: INTEGER_32
			-- Result is width of widest character (W), when displayed.
			-- (from EV_TEXT_COMPONENT_IMP)
		require -- from  EV_TEXT_COMPONENT_I
			True

	prepend_text (txt: READABLE_STRING_GENERAL)
			-- Prepend 'txt' to text of Current.
			-- (from EV_TEXT_COMPONENT_IMP)
		require -- from EV_TEXT_COMPONENT_I
			valid_text: txt /= Void
		ensure -- from EV_TEXT_COMPONENT_I
			text_prepended: 
	
invariant
		-- from EV_WIDGET_I
	is_displayed_implies_show_requested: is_usable and is_displayed implies is_show_requested

		-- from EV_PICK_AND_DROPABLE_I
	user_interface_modes_mutually_exclusive: mode_is_pick_and_drop.to_integer + mode_is_drag_and_drop.to_integer + mode_is_target_menu.to_integer = 1
	pebble_function_takes_two_integer_open_operands: attached pebble_function as l_pebble_function implies l_pebble_function.valid_operands ([1, 1])

		-- from EV_ANY_I
	interface_coupled: is_usable implies interface /= Void and then attached_interface.implementation = Current
	base_make_called: is_usable implies base_make_called

		-- from ANY
	reflexive_equality: standard_is_equal (Current)
	reflexive_conformance: conforms_to (Current)

		-- from EV_POSITIONED_I
	minimum_width_positive_or_zero: is_usable implies minimum_width >= 0
	minimum_height_positive_or_zero: is_usable implies minimum_height >= 0

		-- from EV_DOCKABLE_SOURCE_I
	widget_or_item_source: not (widget_source_being_docked /= Void and item_source_being_docked /= Void)
	dock_executing: is_dock_executing implies widget_source_being_docked /= Void or item_source_being_docked /= Void

		-- from WEL_EDIT
	consistent_selection: exists and then has_selection implies wel_selection_start >= 0 and then wel_selection_start <= wel_text_length and then wel_selection_end >= 0 and then wel_selection_end <= wel_text_length and then wel_selection_start < wel_selection_end
	valid_caret_position: exists implies wel_caret_position >= 0 and then wel_caret_position <= wel_text_length

		-- from EV_RICH_TEXT_BUFFERING_STRUCTURES_I
	rich_text_not_void: rich_text /= Void

note
	copyright: "Copyright (c) 1984-2018, Eiffel Software and others"
	license: "Eiffel Forum License v2 (see http://www.eiffel.com/licensing/forum.txt)"
	source: "[
		Eiffel Software
		5949 Hollister Ave., Goleta, CA 93117 USA
		Telephone 805-685-1006, Fax 805-685-6869
		Website http://www.eiffel.com
		Customer support http://support.eiffel.com
	]"

end -- class EV_RICH_TEXT_IMP


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