Several standard controls used in most Lazarus forms Determines the case of text displayed in the edit box or combobox. Normal mode - Character case according to what the user types. Converts every character that the user types into upper case characters. Converts every character that the user types into lower case characters. TEchoMode: Determines how strings in the edit box are displayed. The scroll action type. Scroll one line up. Scroll one line down. Scroll one page up. Scroll one page down. Scroll to the specified position. Scroll tracking to the specified position. Scroll to the top. Scroll to the bottom. Scroll ends. The scroll event. Determines the scroll action. Contains the current scroll position. TCustomScrollBar : the base class for TScrollBar Create Parameters for the scroll bar The paramaeter list Create a window for the control Change the scroll Bar The scrolling process The code used for scrolling - up or down a line, a page, to the top or bottom etc The position of the scrolling device Create a new instance of the Window Control Defines the Max and Min values, the size of the page and the position of the scroller Kind of scroll bar - whether Horizontal or Vertical LargeChange - the size of the step to be taken by the slider for a large change A LargeChange is produced by the user clicking on the blank area above or below the slider; it is rather analogous to the Page Down or Page Up functions of the Keyboard and is typically set up to move the slider and the contents of the page or canvas by a whole paragraph or half a page or a full page. The maximum value (for bottom of the scroll bar or the right-most extent) the minimum value, for the top of the scroll bar or its left-most extent PageSize: the size of a page - typically used for LargeChange The Position of the scroller along the ScrollBar SmallChange - the size of the step to be taken by the scroller for a small change A small change is produced by the user clicking on one of the triangular tags at either end of the scrollbar. It is rather analogous to the effect of using the up or down arrows on the keyboard, and is typically set to produce a movement of a few pixels or a single line of text Whether the scrollbar can be reached by use of the Tab key - default is True Event handler for any change in position of the slider or other mouse movement or keyboard event associated with the scrollbar OnScroll - Handler for a scrolling event (by mouse, keyboard or program)

OnScroll - Handler for a scrolling event

Called when there is any movement of the slider by mouse, arrow keys or Page Up/Down keys, or if the display in the main window is caused to scroll

TScrollBar - a control that allows the user to scroll the current page or document window by moving a slider

It appears as a long rectangular track or bar within which a smaller contrasting block or slider can move up and down (or from side to side in a horizontal ScrollBar)

It has small triangular indicators or pointers at each end. Typically, for a vertical ScrollBar the top indicator points up, and at the bottom there is a pair of pointers, one up and one down. Clicking with the mouse on one of the pointers moves the slider a small distance (SmallChange) in the specified direction, and the programmer's responsibility is to ensure that the page, image or document in which the ScrollBar is found will scroll by a corresponding small amount

Clicking with the mouse in the blank area of the scrollbar above or below the slider makes the slider move by a larger increment (LargeChange) and scrolls the contents of the window by a larger amount - several lines, a paragraph, half a page or anything up to a page (PageSize)

The slider can also be moved by clicking on it with the mouse, and holding down the button while moving the mouse. The slider follows the mouse until the button is released. If the mouse has a scrollwheel, the slider can be similarly moved by rotating the wheel. In each case, the contents of the window scroll by a corresponding amount

Scrolling of the window and movement of the slider can also be achieved by using the directional arrows or the Page Up/Page Down keys on the keyboard

The location of the slider along the track is held in the Position property, which reports where the mouse has placed it, or can alternatively be set to an arbitrary location by the program. If the mouse or arrow keys are used to move the cursor somewhere on the main window so as to make the display scroll (eg by moving beyond the top or bottom line in a text display) the scroll bar slider moves to indicate the corresponding location along the scroll bar

Used to align the control in one of four directions.

// standard properties, which should be supported by all descendants

Either reads a flag containing alignment instructions (FAlign) or writes alignment instructions (SetAlign)

May have no alignment, may have custom or client alignment, or can be aligned to top, bottom, left or right

The set of anchor definitions for this control

// standard properties, which should be supported by all descendants

Determines how the control is to be anchored to its client or parent conrol

Either reads a flag containing the set of anchors to be used, or writes a set of anchors. If they have been written, this is indicated in IsAnchorsStored

BiDiMode - enabling bi-directional writing Allows Languages such as Arabic and Hebrew to be used Determines the border spacing for this control

// standard properties, which should be supported by all descendants

Determines the border spacing for this control

Reads flag to find stored spacing values required for the border of the control, or writes the flag to set the spacing.

The properties are defined in the parent class TControlBorderSpacing

Determine Constraints (max and min height and width) for this control

// standard properties, which should be supported by all descendants

Determine Constraints (max and min height and width) for this control; reads the size constraints or stores new ones.

DragCursor - the style of cursor to be used during the Drag process DragMode - whether manual or automatic Whether the control is Enabled. If not, it usually appears 'greyed-out'

// standard properties, which should be supported by all descendants

Whether the control is Enabled. If not, it usually appears 'greyed-out'

Reads a flag to see whether the control is enabled, or stores a new value. If stored, sets a flag to say so.

Kind of scroll bar - whether Horizontal or Vertical LargeChange - the size of the step to be taken by the slider for a large change A LargeChange is produced by the user clicking on the blank area above or below the slider; it is rather analogous to the Page Down or Page Up functions of the Keyboard and is typically set up to move the slider and the contents of the page or canvas by a whole paragraph or half a page or a full page. The maximum value (for bottom of the scroll bar or the right-most extent) the minimum value, for the top of the scroll bar or its left-most extent PageSize: the size of a page - typically used for LargeChange ParentBiDiMode - does the control follow the BiDiMode settings of its parent? ParentShowHint - does the control adopt the same hinting behaviour as its parent? Default is true PopupMenu - a context-sensitive menu that pops up when the right mouse button is clicked over this control // standard properties, which should be supported by all descendants
Reads the details of the pop-up menu, or stores them.
Properties are defined in the parent class TPopupMenu The Position of the scroller along the ScrollBar SmallChange - the size of the step to be taken by the scroller for a small change A small change is produced by the user clicking on one of the triangular tags at either end of the scrollbar. It is rather analogous to the effect of using the up or down arrows on the keyboard, and is typically set to produce a movement of a few pixels or a single line of text The place this control occupies in the list of tabs Reads or writes information in flag; default is -1 Whether the scrollbar can be reached by use of the Tab key - default is True Visible - can the control be seen?

The Visible property represents the ability to see a visual control. 
          If Visible is True the control is shown, otherwise it is hidden.
          Calling Show sets, among others, Visible to True.
          Setting Visible to False is equivalent to calling Hide method.

The Visible property does not depend on control's parent visibility. Use IsVisible method to consider this and get real visibility. Event handler for any change in position of the slider or other mouse movement or keyboard event associated with the scrollbar Event handler for the Drag-Drop manoeuvre Event handler for the end of a dragging process OnEnter - event handler for when the mouse enters the control, and the control receives focus OnExit - event handler for when the mouse leaves the control and it loses focus OnKeyDown - event handler for instance when key is down while control has focus

OnKeyDown - event handler for instance when key is down while control has focus

Differs from OnKeyPress in that the key may have already been down when the control received focus; with OnKeyPress the key needs to become pressed while the control has focus.

OnKeyPress - event controller for a key being pressed while the control has focus

OnKeyPress - event controller for a key being pressed while the control has focus

Differs from OnKeyDown in that the key needs to become pressed while the control has focus; with OnKeyDown the key may have already been down when the control received focus.

OnKeyUp - event handler for instance when a key is up (not pressed) while the control has focus

The key may already have been up when the control received focus, or a pressed key may become released during the time the control has focus.

OnScroll - Handler for a scrolling event (by mouse, keyboard or program)

OnScroll - Handler for a scrolling event

Called when there is any movement of the slider by mouse, arrow keys or Page Up/Down keys, or if the display in the main window is caused to scroll

Event handler for start of dragging process TCustomGroupBox - the base class for TGroupBox, TRadioGroup and TCheckGroup GetControlClassDefaultSize - finds out default size for the class TGroupBox - a container that allows a number of objects to be grouped physically and conceptually on the form

Group Box. Allows a number of objects to be grouped physically and conceptually on the form; they can be moved around together and have certain properties in common.

Used to align the control in one of four directions.

// standard properties, which should be supported by all descendants

Either reads a flag containing alignment instructions (FAlign) or writes alignment instructions (SetAlign)

May have no alignment, may have custom or client alignment, or can be aligned to top, bottom, left or right

The set of anchor definitions for this control

// standard properties, which should be supported by all descendants

Determines how the control is to be anchored to its client or parent conrol

Either reads a flag containing the set of anchors to be used, or writes a set of anchors. If they have been written, this is indicated in IsAnchorsStored

BiDiMode - enabling bi-directional writing Allows Languages such as Arabic and Hebrew to be used Determines the border spacing for this control

// standard properties, which should be supported by all descendants

Determines the border spacing for this control

Reads flag to find stored spacing values required for the border of the control, or writes the flag to set the spacing.

The properties are defined in the parent class TControlBorderSpacing

Caption - the text-string appearing on the Control, usually used to identify its function Definitions of how any child control is to be sized Reads values from flag or stores values to flag. Most of the properties are inherited from TControlChildSizing,
which you should read to find out more about this control ClientHeight - determines the height of the client within which the control exists

// standard properties, which should be supported by all descendants

Finds or sets the client height, and sets a flag if it has been stored

ClientWidth - determines the width of the client within which the control exists

// standard properties, which should be supported by all descendants

ClientWidth - determines the width of the client within which the control exists; reads the width of the client control or sets the value. Sets flag if value is stored

Determine the colour for the current control

// standard properties, which should be supported by all descendants

Reads the value for colour, or stores the value, and sets a flag if the colour is stored.

The default colour is the same as the window in which the control is located.

Determine Constraints (max and min height and width) for this control

// standard properties, which should be supported by all descendants

Determine Constraints (max and min height and width) for this control; reads the size constraints or stores new ones.

Is this a dock site? Default false Reads or sets a flag to show whether this is a dock site. Default false DragCursor - the style of cursor to be used during the Drag process DragKind - what sort of dragging? Drag or Dock DragMode - whether manual or automatic Whether the control is Enabled. If not, it usually appears 'greyed-out'

// standard properties, which should be supported by all descendants

Whether the control is Enabled. If not, it usually appears 'greyed-out'

Reads a flag to see whether the control is enabled, or stores a new value. If stored, sets a flag to say so.

The Font to be used for text in this control

// standard properties, which should be supported by all descendants

Reads a flag to see what font should be used, or sets a flag to store it. If stored, sets a flag to say so

The properties of Font are defined in the parent class TFont

ParentBiDiMode - does the control follow the BiDiMode settings of its parent? ParentColor - should the control have the same colour as the parent? Default is true ParentFont - should the control use the same font as the parent? Default is true ParentShowHint - does the control adopt the same hinting behaviour as its parent? Default is true PopupMenu - a context-sensitive menu that pops up when the right mouse button is clicked over this control // standard properties, which should be supported by all descendants
Reads the details of the pop-up menu, or stores them.
Properties are defined in the parent class TPopupMenu Flag to determine: Is hint to be displayed for this control? // standard properties, which should be supported by all descendants
Reads flag or writes one to determine if a hint is to be shown when mouse hovers over this control. If value is stored, a storage flag is set. Display of the actual hint is controlled by OnShowHint The place this control occupies in the list of tabs Reads or writes information in flag; default is -1 TabStop - determines if the user can tab to a control.

Reads or writes boolean flag; default is False

Use the TabStop to allow or disallow access to the control using the Tab key.

If TabStop is True, the control is in the tab order. If TabStop is False, the control is not in the tab order and the user can't use the Tab key to move to the control.

Visible - can the control be seen?

The Visible property represents the ability to see a visual control. 
          If Visible is True the control is shown, otherwise it is hidden.
          Calling Show sets, among others, Visible to True.
          Setting Visible to False is equivalent to calling Hide method.

The Visible property does not depend on control's parent visibility. Use IsVisible method to consider this and get real visibility. Event handler for a change in bounds of the control

// standard properties, which should be supported by all descendants

Reads or Writes flag if bounds are changed

Event Handler for mouse click

// standard properties, which should be supported by all descendants

This is often the default action for many controls, and is often the ONLY action specified by the programmer. The action can be spcified by the user, either by typing explicit code into the implementation section for this control, or by selecting an action from a pre-supplied ActionList

Reads or writes a flag if a mouse click is detected, and sets a flag if a value is stored.

Event Handle for mouse double-click

Double-clicking is much more common in a Windows environment than in Unix or Linux, where single-clicking is the default method for selecting an object. However, in all environments there could be valid use for a double-click, and a method should be supplied if appropriate.

Event handler for the Drag-Drop manoeuvre Event handler for the case when a control is dragged over another control Event handler for the end of a docking manoeuvre Event handler for the end of a dragging process OnEnter - event handler for when the mouse enters the control, and the control receives focus OnExit - event handler for when the mouse leaves the control and it loses focus OnKeyDown - event handler for instance when key is down while control has focus

OnKeyDown - event handler for instance when key is down while control has focus

Differs from OnKeyPress in that the key may have already been down when the control received focus; with OnKeyPress the key needs to become pressed while the control has focus.

OnKeyPress - event controller for a key being pressed while the control has focus

OnKeyPress - event controller for a key being pressed while the control has focus

Differs from OnKeyDown in that the key needs to become pressed while the control has focus; with OnKeyDown the key may have already been down when the control received focus.

OnKeyUp - event handler for instance when a key is up (not pressed) while the control has focus

The key may already have been up when the control received focus, or a pressed key may become released during the time the control has focus.

Event handler for when a mouse button is pressed down Event handler for mouse movement within the current control Event handler for when the mouse button is released, ie "up" Event Handler for resize of control // standard properties, which should be supported by all descendants
Reads or Writes flag if control is re-sized. Event handler for the start of a docking manoeuvre Event handler for start of dragging process OnUnDock - event handler for control becoming disconnected (undocked) from parent Defines the behavior of the AutoComplete feature in a combobox control.

TComboBoxAutoCompleteTextOption defines the behavior of the AutoComplete feature.

cbactEnabled: Enable Auto-Completion feature.
cbactEndOfLineComplete: Perform Auto-Complete only when cursor is at the end of the string.
cbactRetainPrefixCase: Retains the case of characters user has typed. (This option has no effect if cbactEndOfLineComplete is False)
cbactSearchCaseSensitive: Search completion string with case sensitivity.
cbactSearchAscending: Search completion string in accending order. (False will search in descending order)

Set of TComboBoxAutoCompleteTextOption ComboBox Style ComboBox Style: may be Simple, a single-line Drop-Down or a Drop-Down list, or some version drawn by the Owner TCustomComboBox - the base class from which TComboBox is derived

TCustomComboBox - the base class from which TComboBox is derived

Despite similarities in appearance to TCustomEdit and TCustomList , the class inherits no properties from these classes, but only from TWinControl

It has some interesting properties including AutoComplete and AutoCompleteText, AutoDropDown and the ability to create and add a History display

FCharCase: TEditCharCase FAutoCompleteText: TComboBoxAutoCompleteText Private variable of property AutoCompleteText. Options for behavior of the Auto-Complete feature. FAutoSelect: Boolean

Private variable for property AutoSelect. When True, the edit control will select all its text when:

It receives focus
The Enter key is pressed.
A new item is selected.

FAutoSelected: Boolean Private variable for property AutoSelected. True indicate that the edit or combobox control has just performed an AutoSelect operation so that subsequent mouse-clicks and keystrokes proceed normally without selecting the text. False is set when the edit or combobox control loses focus. Combo Box Initialise the window for this control Destroy the window for this control DropDownCount - number of entries in the drop-down list ItemHeight - the height of the current item in the drop-down list ItemWidth - the width of the current item in the drop-down list MaxLength - the maximum allowed length of a string OnChange - event handler for any change in properties of the combo box OnCloseUp - event handler for when the drop-down box is closed up again OnDrawItem - event handler for when an entry is written to the Items list OnDropDown - event handler for when the drop-down list appears Event handler when measurement of an item is required Event handler when this control is selected Is the colour of the parent control to be used (default false)? Sorted - whether the entries in the drop-down list have been sorted Create a new instance of the Window Control Destroy this instance of the Window Control, and return the resources used AddItem - adds an Item to the list in the drop-down box AddHistoryItem - Add an Item as first entry in History List

AddHistoryItem - Add an Item as first entry in History List

Removes the Item from old position and removes last item if history is full

The item to be addd to the list The maximum number of items that can be added to the history Whether the item is to be set as text Whether the item is added in a case sensitive manner (eg determines how they are sorted) The history item to be added, expressed as an object Clear - remove all text and drop-down list ClearSelection - clear the currently selected text or items from drop-down list CharCase: indicates whether text is to be displayed as Upper, Lower or Normal case (as entered)

Indicates how text is displayed in a text editing control in the following ways:

Normal case letters
Upper case letters
Lower case letters

DroppedDown - indicates whether or not the drop-down list has appeared Measure the size (Height) of an item in the drop-down list The index number of the item whose height is to be measured The height as measured by the procedure Select all items in the list AutoComplete - enables the facility to offer suggestions for completing text-strings AutoCompleteText : Options for behavior of the Auto-Complete feature

AutoCompleteText : Options for behavior of the Auto-Complete feature

Enabled: Enable Auto-Completion feature.
EndOfLineComplete: Perform Auto-Complete only when cursor is at the end of the string.
RetainPrefixCase: Retains the case of characters user has typed. (This option has no effect if cbactEndOfLineComplete is False)
SearchCaseSensitive: Search completion string with case sensitivity.
cbactSearchAscending: Search completion string in accending order. (False will search in descending order)

This property exists as a Set of Options, so zero or more options may be operational

AutoDropDown - if True, the drop-down list appears as soon as the cursor moves over the text box

If False, the drop-down box only appears when the downward triangular indicator at the end of the box is selected

AutoSelect : Boolean. If True, all contents of Text box are selected when control receives focus

When True, the edit control will select all its text when:

It receives focus
The Enter key is pressed.
A new item is selected.

AutoSelected : True indicates that the combobox control has just performed an AutoSelect operation

True indicates that the combobox control has just performed an AutoSelect operation so that subsequent mouse-clicks and keystrokes proceed normally without selecting the text.

False is set when the combobox control loses focus.

ArrowKeysTraverseList - enables the operator to use the keyboard Arrow keys to move through the list as an alternative to using the mouse Canvas - the area on which the components are drawn or painted Items - an array of strings that holds the entries of the drop-down list Index - the number of the currently selected item (starting at zero)

Index - the number of the currently selected item

The first item has number 0, the second has number 1, the third number 2, etc.

In case no item is selected, ItemIndex has value -1.

ReadOnly - if True, information in the control can only be Read, not Written or Deleted SelLength - the length of the text that has been selected SelStart - the starting position of the text that has been selected SelText - the text string that has been selected for editing Style : may be Simple, a single-line Drop-Down or a Drop-Down list, or some version drawn by the Owner Text - the string appearing in the main box. If an item on the drop-down list is selected, it replaces the contents of Text TabStop - determines if the user can tab to a control.

Reads or writes boolean flag; default is False

Use the TabStop to allow or disallow access to the control using the Tab key.

If TabStop is True, the control is in the tab order. If TabStop is False, the control is not in the tab order and the user can't use the Tab key to move to the control.

TComboBox - a simple combination of text box for free text entry, and a drop-down list allowing one of several options to be chosen.

The default text-string (if any, entered in the Form Designer) and the value of the text string that is ultimately selected from the drop-down list, is held in Text

The values that can be selected from the drop-down list are held in the string-array Items. Clicking on the ellipsis (...) next to Items in the Object Inspector opens a pop-up string-list editor which allows the designer to enter and edit a number of lines of text to represent the selections

At run-time, the entry selected from the drop-down list in Items is used to replace any information previously found in Text, and ItemIndex holds the (zero-origin) index number of the selected item

If no value is selected from the drop-down list, the default text (if any) remains, or any information typed directly into Text will be returned, and ItemIndex takes the value of -1

Used to align the control in one of four directions. Align the Control with other Controls in its vicinity The set of anchor definitions for this control Anchors - enables the operator to use the keyboard Arrow keys to move through the list as an alternative to using the mouse - enables the facility to offer suggestions for completing text-strings : Options for behavior of the Auto-Complete feature - if True, the drop-down list appears as soon as the cursor moves over the text box : Boolean. If True, all contents of box are selected when control receives focus Whether auto-size is to be used

// standard properties, which should be supported by all descendants

AutoSize permits the size of a control to be adjusted automatically, for example a button can become bigger or smaller to accommodate a longer or shorter caption.

Reads logical (boolean) flag to see whether auto-sizing is to be operated, or writes the flag to say it should be done. Default is false, ie no auto-sizing

Determine Constraints (max and min height and width) for this control

// standard properties, which should be supported by all descendants

Determine Constraints (max and min height and width) for this control; reads the size constraints or stores new ones.

BiDiMode - enabling bi-directional writing Allows Languages such as Arabic and Hebrew to be used Determines the border spacing for this control

// standard properties, which should be supported by all descendants

Determines the border spacing for this control

Reads flag to find stored spacing values required for the border of the control, or writes the flag to set the spacing.

The properties are defined in the parent class TControlBorderSpacing

CharCase: indicates whether text is to be displayed as Upper, Lower or Normal case (as entered)

Indicates how text is displayed in a text editing control in the following ways:

Normal case letters
Upper case letters
Lower case letters

Determine the colour for the current control

// standard properties, which should be supported by all descendants

Reads the value for colour, or stores the value, and sets a flag if the colour is stored.

The default colour is the same as the window in which the control is located.

DragCursor - the style of cursor to be used during the Drag process DragMode - whether manual or automatic DropDownCount - number of entries in the drop-down list Whether the control is Enabled. If not, it usually appears 'greyed-out'

// standard properties, which should be supported by all descendants

Whether the control is Enabled. If not, it usually appears 'greyed-out'

Reads a flag to see whether the control is enabled, or stores a new value. If stored, sets a flag to say so.

The Font to be used for text in this control

// standard properties, which should be supported by all descendants

Reads a flag to see what font should be used, or sets a flag to store it. If stored, sets a flag to say so

The properties of Font are defined in the parent class TFont

ItemHeight - the height of the current item in the drop-down list Index - the number of the currently selected item (starting at zero)

Index - the number of the currently selected item

The first item has number 0, the second has number 1, the third number 2, etc.

In case no item is selected, ItemIndex has value -1.

Items - an array of strings that holds the entries of the drop-down list ItemWidth - the width of the current item in the drop-down list MaxLength - the maximum allowed length of a string OnChange - event handler for any change in properties of the combo box Event handler for a change in bounds of the control

// standard properties, which should be supported by all descendants

Reads or Writes flag if bounds are changed

Event Handler for mouse click

// standard properties, which should be supported by all descendants

Reads or writes a flag if a mouse click is detected, and sets a flag if a value is stored.

OnCloseUp - event handler for when the drop-down box is closed up again Event Handle for mouse double-click

Event handler for the Drag-Drop manoeuvre Event handler for the case when a control is dragged over another control OnDrawItem - event handler for when an entry is written to the Items list Event handler for the end of a dragging process OnDropDown - event handler for when the drop-down list appears Event handler when editing is done OnEnter - event handler for when the mouse enters the control, and the control receives focus OnExit - event handler for when the mouse leaves the control and it loses focus OnKeyDown - event handler for instance when key is down while control has focus

OnKeyDown - event handler for instance when key is down while control has focus

Differs from OnKeyPress in that the key may have already been down when the control received focus; with OnKeyPress the key needs to become pressed while the control has focus.

OnKeyPress - event controller for a key being pressed while the control has focus

OnKeyPress - event controller for a key being pressed while the control has focus

Differs from OnKeyDown in that the key needs to become pressed while the control has focus; with OnKeyDown the key may have already been down when the control received focus.

OnKeyUp - event handler for instance when a key is up (not pressed) while the control has focus

The key may already have been up when the control received focus, or a pressed key may become released during the time the control has focus.

Event handler when measurement of an item is required Event handler for when a mouse button is pressed down Event handler for mouse movement within the current control Event handler for when the mouse button is released, ie "up" Event handler for start of dragging process Event handler when this control is selected ParentBiDiMode - does the control follow the BiDiMode settings of its parent? ParentColor - should the control have the same colour as the parent? Default is true ParentFont - should the control use the same font as the parent? Default is true ParentShowHint - does the control adopt the same hinting behaviour as its parent? Default is true PopupMenu - a context-sensitive menu that pops up when the right mouse button is clicked over this control // standard properties, which should be supported by all descendants
Reads the details of the pop-up menu, or stores them.
Properties are defined in the parent class TPopupMenu ReadOnly - if True, information in the control can only be Read, not Written or Deleted Flag to determine: Is hint to be displayed for this control? // standard properties, which should be supported by all descendants
Reads flag or writes one to determine if a hint is to be shown when mouse hovers over this control. If value is stored, a storage flag is set. Display of the actual hint is controlled by OnShowHint Sorted - whether the entries in the drop-down list have been sorted Style : may be Simple, a single-line Drop-Down or a Drop-Down list, or some version drawn by the Owner The place this control occupies in the list of tabs Reads or writes information in flag; default is -1 TabStop - determines if the user can tab to a control.

Reads or writes boolean flag; default is False

Use the TabStop to allow or disallow access to the control using the Tab key.

If TabStop is True, the control is in the tab order. If TabStop is False, the control is not in the tab order and the user can't use the Tab key to move to the control.

Text - the string appearing in the main box. If an item on the drop-down list is selected, it replaces the contents of Text Visible - can the control be seen?

The Visible property represents the ability to see a visual control. 
          If Visible is True the control is shown, otherwise it is hidden.
          Calling Show sets, among others, Visible to True.
          Setting Visible to False is equivalent to calling Hide method.

The Visible property does not depend on control's parent visibility. Use IsVisible method to consider this and get real visibility. TCustomList Box : the base class for TListBox Clear the selected items Event handler when an item requires to be measured Create a new instance of the Window Control Destroy this instance of the Window Control, and return the resources used Find the index at the Y coordinate The integer value of the Y coordinate Get the selected text string Returns the index value of the item at the specified position Returns the coordinates of the rectangle in which the item lies Is the item with the specified index visible? Is the item with the specified index fully visible (or is part of it outside the bounds of the visible window)? Measure the height of the item in the list with the specified index The index value of the item to be measured The height of the item as measured by the procedure Clear the listbox - both the edit box and the drop-down list Lock ( make permanent) the change in the selection Unlock the previously locked change in selection Procedure to emulate the onClick event handler Used to align the control in one of four directions.

// standard properties, which should be supported by all descendants

Either reads a flag containing alignment instructions (FAlign) or writes alignment instructions (SetAlign)

May have no alignment, may have custom or client alignment, or can be aligned to top, bottom, left or right

The set of anchor definitions for this control

// standard properties, which should be supported by all descendants

Determines how the control is to be anchored to its client or parent conrol

Either reads a flag containing the set of anchors to be used, or writes a set of anchors. If they have been written, this is indicated in IsAnchorsStored

BorderStyle - none, or single Canvas - defines the area on which all graphic material is drawn Performs Click procedure when the selection is changed (which usually puts the selected item into the edit box) Columns - the number of vertical columns in which the Items are arranged Determine Constraints (max and min height and width) for this control

// standard properties, which should be supported by all descendants

Determine Constraints (max and min height and width) for this control; reads the size constraints or stores new ones.

Count - the number of entries in the list of Items ExtendedSelect - boolean. Whether extended selection is allowed. Default True The Font to be used for text in this control

// standard properties, which should be supported by all descendants

Reads a flag to see what font should be used, or sets a flag to store it. If stored, sets a flag to say so

The properties of Font are defined in the parent class TFont

not implemented ItemHeight - the height of the individual Items ItemIndex: Integer to indicate the currently selected item (zero origin) Indicates the currently selected item. The first item has number 0, the second has number 1, the third number 2, etc. In case no item is selected, ItemIndex has value -1. If MultiSelect is True, ItemIndex represents the item which has focus, which typically has a different color from the other items. Items - an array of strings representing the list of entries MultiSelect - allows more than one Item from the list to be selected at a time, by pressing the CTRL or SHIFT key while selecting Event handler for a change in bounds of the control

// standard properties, which should be supported by all descendants

Reads or Writes flag if bounds are changed

Event Handler for mouse click

// standard properties, which should be supported by all descendants

Reads or writes a flag if a mouse click is detected, and sets a flag if a value is stored.

Event Handle for mouse double-click

OnDrawItem - event handler for drawing an Item

For example, selecting an item may require it to be highlighted or have its font or background changed

OnEnter - event handler for when the mouse enters the control, and the control receives focus OnExit - event handler for when the mouse leaves the control and it loses focus OnKeyDown - event handler for instance when key is down while control has focus

OnKeyDown - event handler for instance when key is down while control has focus

Differs from OnKeyPress in that the key may have already been down when the control received focus; with OnKeyPress the key needs to become pressed while the control has focus.

OnKeyPress - event controller for a key being pressed while the control has focus

OnKeyPress - event controller for a key being pressed while the control has focus

Differs from OnKeyDown in that the key needs to become pressed while the control has focus; with OnKeyDown the key may have already been down when the control received focus.

OnKeyUp - event handler for instance when a key is up (not pressed) while the control has focus

The key may already have been up when the control received focus, or a pressed key may become released during the time the control has focus.

Event handler for when a mouse button is pressed down Event handler for mouse movement within the current control Event handler for when the mouse button is released, ie "up" Event handler for when the mouse enters the area of the current control Event handler for when the mouse leaves the area of the current control OnMouseWheel - event handler for movement of the scroll-wheel on the mouse OnMouseWheelDown - event handler for downwards scrolling movement of the mouse wheel OnMouseWheelUp - event handler for upward scrolling movement of the mouse wheel Event Handler for resize of control // standard properties, which should be supported by all descendants
Reads or Writes flag if control is re-sized. OnSelectionChange - event handler for changing the Item selected ParentFont - should the control use the same font as the parent? Default is true ParentShowHint - does the control adopt the same hinting behaviour as its parent? Default is true PopupMenu - a context-sensitive menu that pops up when the right mouse button is clicked over this control // standard properties, which should be supported by all descendants
Reads the details of the pop-up menu, or stores them.
Properties are defined in the parent class TPopupMenu The number of selected iems in the drop-down list Selected - whether the Item with given Index has been selected Flag to determine: Is hint to be displayed for this control? // standard properties, which should be supported by all descendants
Reads flag or writes one to determine if a hint is to be shown when mouse hovers over this control. If value is stored, a storage flag is set. Display of the actual hint is controlled by OnShowHint Sorted - whether the selected Items in the list have been arranged in alphabetical order Style of List Box - normal, owner-draw fixed, or owner-draw variable The place this control occupies in the list of tabs Reads or writes information in flag; default is -1 TabStop - determines if the user can tab to a control.

Reads or writes boolean flag; default is False

Use the TabStop to allow or disallow access to the control using the Tab key.

If TabStop is True, the control is in the tab order. If TabStop is False, the control is not in the tab order and the user can't use the Tab key to move to the control.

Topindex - the highest value of Index in this list Visible - can the control be seen?

The Visible property represents the ability to see a visual control. 
          If Visible is True the control is shown, otherwise it is hidden.
          Calling Show sets, among others, Visible to True.
          Setting Visible to False is equivalent to calling Hide method.

The Visible property does not depend on control's parent visibility. Use IsVisible method to consider this and get real visibility. TListBox : a simple string list from which a choice is made

TListBox : a simple string list from which a choice is made

The array of strings is held in Items

Clicking on the ellipsis (...) next to the Items entry in the Object Inspector at design-time opens a string-list editor in which the individual text-strings for the list can be entered or edited. The editor also allows the entries to be sorted alphabetically in normal or reverse order.

Used to align the control in one of four directions.

// standard properties, which should be supported by all descendants

Either reads a flag containing alignment instructions (FAlign) or writes alignment instructions (SetAlign)

May have no alignment, may have custom or client alignment, or can be aligned to top, bottom, left or right

The set of anchor definitions for this control

// standard properties, which should be supported by all descendants

Determines how the control is to be anchored to its client or parent conrol

Either reads a flag containing the set of anchors to be used, or writes a set of anchors. If they have been written, this is indicated in IsAnchorsStored

TControlBiDiMode - enabling bi-directional writing Allows Languages such as Arabic and Hebrew to be used Determines the border spacing for this control

// standard properties, which should be supported by all descendants

Determines the border spacing for this control

Reads flag to find stored spacing values required for the border of the control, or writes the flag to set the spacing.

The properties are defined in the parent class TControlBorderSpacing

BorderStyle - none, or single Performs Click procedure when the selection is changed (which usually puts the selected item into the edit box) Determine the colour for the current control

// standard properties, which should be supported by all descendants

Reads the value for colour, or stores the value, and sets a flag if the colour is stored.

The default colour is the same as the window in which the control is located.

Columns - the number of vertical columns in which the Items are arranged Determine Constraints (max and min height and width) for this control

// standard properties, which should be supported by all descendants

Determine Constraints (max and min height and width) for this control; reads the size constraints or stores new ones.

DragCursor - the style of cursor to be used during the Drag process DragMode - whether manual or automatic ExtendedSelect - boolean. Whether extended selection is allowed. Default True Whether the control is Enabled. If not, it usually appears 'greyed-out'

// standard properties, which should be supported by all descendants

Whether the control is Enabled. If not, it usually appears 'greyed-out'

Reads a flag to see whether the control is enabled, or stores a new value. If stored, sets a flag to say so.

The Font to be used for text in this control

// standard properties, which should be supported by all descendants

Reads a flag to see what font should be used, or sets a flag to store it. If stored, sets a flag to say so

The properties of Font are defined in the parent class TFont

not implemented Items - an array of strings representing the list of entries ItemHeight - the height of the individual Items MultiSelect - allows more than one Item from the list to be selected at a time, by pressing the CTRL or SHIFT key while selecting Event handler for a change in bounds of the control

// standard properties, which should be supported by all descendants

Reads or Writes flag if bounds are changed

Event Handler for mouse click

// standard properties, which should be supported by all descendants

Reads or writes a flag if a mouse click is detected, and sets a flag if a value is stored.

Event Handle for mouse double-click

Event handler for the Drag-Drop manoeuvre Event handler for the case when a control is dragged over another control OnDrawItem - event handler for drawing an Item

OnDrawItem - event handler for drawing an Item

For example, selecting an item may require it to be highlighted or have its font or background changed

OnEnter - event handler for when the mouse enters the control, and the control receives focus Event handler for the end of a dragging process OnExit - event handler for when the mouse leaves the control and it loses focus OnKeyPress - event controller for a key being pressed while the control has focus

OnKeyPress - event controller for a key being pressed while the control has focus

Differs from OnKeyDown in that the key needs to become pressed while the control has focus; with OnKeyDown the key may have already been down when the control received focus.

OnKeyDown - event handler for instance when key is down while control has focus

Differs from OnKeyPress in that the key may have already been down when the control received focus; with OnKeyPress the key needs to become pressed while the control has focus.

OnKeyUp - event handler for instance when a key is up (not pressed) while the control has focus

The key may already have been up when the control received focus, or a pressed key may become released during the time the control has focus.

Event handler for mouse movement within the current control Event handler for when a mouse button is pressed down Event handler for when the mouse button is released, ie "up" Event handler for when the mouse enters the area of the current control Event handler for when the mouse leaves the area of the current control OnMouseWheel - event handler for movement of the scroll-wheel on the mouse OnMouseWheelDown - event handler for downwards scrolling movement of the mouse wheel OnMouseWheelUp - event handler for upward scrolling movement of the mouse wheel Event Handler for resize of control // standard properties, which should be supported by all descendants
Reads or Writes flag if control is re-sized. OnSelectionChange - event handler for changing the Item selected Event Handler when a hint needs to be shown // standard properties, which should be supported by all descendants
Reads or Writes a flag when a hint (a small pop-up box, appearing when the mouse hovers over an object) is to be shown Event handler for start of dragging process ParentBiDiMode - does the control follow the BiDiMode settings of its parent? ParentShowHint - does the control adopt the same hinting behaviour as its parent? Default is true ParentFont - should the control use the same font as the parent? Default is true PopupMenu - a context-sensitive menu that pops up when the right mouse button is clicked over this control // standard properties, which should be supported by all descendants
Reads the details of the pop-up menu, or stores them.
Properties are defined in the parent class TPopupMenu Flag to determine: Is hint to be displayed for this control? // standard properties, which should be supported by all descendants
Reads flag or writes one to determine if a hint is to be shown when mouse hovers over this control. If value is stored, a storage flag is set. Display of the actual hint is controlled by OnShowHint Sorted - whether the selected Items in the list have been arranged in alphabetical order Style of List Box - normal, owner-draw fixed, or owner-draw variable The place this control occupies in the list of tabs Reads or writes information in flag; default is -1 TabStop - determines if the user can tab to a control.

Reads or writes boolean flag; default is False

Use the TabStop to allow or disallow access to the control using the Tab key.

If TabStop is True, the control is in the tab order. If TabStop is False, the control is not in the tab order and the user can't use the Tab key to move to the control.

Topindex - the highest value of Index in this list Visible - can the control be seen?

The Visible property represents the ability to see a visual control. 
          If Visible is True the control is shown, otherwise it is hidden.
          Calling Show sets, among others, Visible to True.
          Setting Visible to False is equivalent to calling Hide method.

The Visible property does not depend on control's parent visibility. Use IsVisible method to consider this and get real visibility. TCustomEdit : the base type from which the TEdit Box is derived.

TCustomEdit : the base type from which the TEdit Box is derived.

This control deals, for example, with issues such as selection of text sub-strings within the whole text string which are to be edited (cut, pasted, deleted, highlighted etc)

FAutoSelect: Boolean

Private variable for property AutoSelect.

When True, the edit control will select all its text when:

It receives focus
The Enter key is pressed.
A new item is selected.

FAutoSelected: Boolean Private variable for property AutoSelected. True indicate that the edit or combobox control has just performed an AutoSelect opertation so that subsequent mouse-clicks and keystrokes proceds normally without selecting the text. False is set when the edit or combobox control loses focus. FCharCase: TEditCharCase

Private variable for property CharCase. Indicates how text is displayed in a text editing control.

Normal case letters
Upper case letters
Lower case letters

CalculatePreferredSize - find default/preferred height and width

procedure TControl.CalculatePreferredSize

(var PreferredWidth, PreferredHeight: integer; WithThemeSpace: Boolean);

Calculates the default/preferred width and height for a control, which is used by the LCL autosizing algorithms as default size. Only positive values are valid. Negative or 0 are treated as undefined and the LCL uses other sizes instead.

TWinControl overrides this and asks the interface for theme dependent values. See TWinControl.CalculatePreferredSize for more information.

WithThemeSpace: If true, adds space for stacking.

For example: TRadioButton has a minimum size. But for stacking multiple TRadioButtons there should be some space around. This space is theme dependent, so the parameter is passed to the widgetset.

AutoSelect : if True, the edit control will select all its text when it receives focus or when the Enter key is pressed. AutoSelected : if True, indicates that the edit control has just performed an AutoSelect operation

If True, indicates that the edit control has just performed an AutoSelect operation so that subsequent mouse-clicks and keystrokes proceed normally without selecting the text.

False is set when the edit control loses focus.

Create a new instance of the Window Control Clear - delete all text SelectAll text, for example in order to copy or delete it ClearSelection - delete all characters in selected text CopyToClipboard - put a copy of the selection on the clipboard, while leaving the original text in place CutToClipboard - remove the selected text from its original location and put it on the clipboard PasteFromClipboard - put a copy of the clipboard contents at the current writing position BorderStyle - none, or single TEditCharCase - rules for what case to use (upper or lower) to display text

Indicates how text is displayed in a text editing control in the following ways:

Normal case letters
Upper case letters
Lower case letters

The rules can, of course, be overridden by use of the shift key.

EchoMode - how to echo keypresses on screen: normal (returning the actual character for that key), all upper or lower case, or a masking character as used in entering passwords MaxLength : maximum length allowed for text string Whether the text has been modified Modified: has the text been modified since creation? OnChange - event handler for any change in text PasswordChar : the character which appears in the Edit box replacing and masking the actual character typed

PasswordChar : the character which appears in the Edit box replacing and masking the actual character typed.

Typically used in password input, to prevent the typed characters from being seen by passers-by or casual observers (or even malicious observers!)

PopupMenu - a context-sensitive menu that pops up when the right mouse button is clicked over this control // standard properties, which should be supported by all descendants
Reads the details of the pop-up menu, or stores them.
Properties are defined in the parent class TPopupMenu ReadOnly - the contents of the edit box may only be read, not written or erased SelLength : the length (in characters) of the text that has been selected for editing Sel Start: the index of the character from which selection (for editing) begins Sel Text : the string within the edit control that has been selected for editing The place this control occupies in the list of tabs Reads or writes information in flag; default is -1 TabStop - determines if the user can tab to a control.

Reads or writes boolean flag; default is False

Use the TabStop to allow or disallow access to the control using the Tab key.

If TabStop is True, the control is in the tab order. If TabStop is False, the control is not in the tab order and the user can't use the Tab key to move to the control.

Text : the character string contained in the Edit Box Text : the character string contained in the Edit Box TMemoScrollBar - a Scroll Bar specifically for use in Memo Boxes Scroll Bar specifically for use in Memo Boxes. Inherits most of its properties from its ancestor, TControlScrollBar GetHorzScrollBar - find the position and properties of the horizontal scroll bar GetVertScrollBar - find the position and properties of the vertical scroll bar The size of the scrolling increment The amount by which the scroll indicator moves if the triangle at either end of the bar is selected.
Read or write a flag to determine the increment, an integer with a default value of 8 (pixels) The size of the paging increment for scrolling The amount by which the scroll indicator moves if the cursor selects the scroll bar above, below or on either side of the scroll indicator.
Reads or writes a flag to determine paging increment; default value is 80 pixels Determine whether smooth scrolling is to be implemented Reads or writes a flag to determine smooth scrolling, and sets a flag is the scrolling status is stored Position of the scroll bar Reads or writes a flag with the position; default is zero The range (extent) of the scroll bar Reads or writes a flag to determine the range; default is zero Determine the size of the scroll bar Reads or writes a flag to determine the size; by default the size is not stored Is the scroll bar visible? Reads or writes flag to determine visibility, and sets a flag if the property is stored TCustomMemo : the base class for TMemo Create Create the Custom memo widget Destroy Destroy the CustomMemo widget when you have finished with it Append - procedure for adding a text string to the Memo Alignment - whether text is centered, left- or right-justified Lines : an array of strings (single lines of characters) which contains the text held or being entered in the Memo Lines : an array of strings (representing single lines of characters) which contains the textual material held or being entered in the Memo. The array is zero-indexed, ie the strings are numbered [0..numLines-1] The horizontal scroll bar for this memo The Vertical scroll bar for this memo Whether the Memo has ScrollBars - none, horizontal or vertical or both, or automatically placed if needed Whether Return characters are required to be included in the memo Whether Tab characters are required to be retained in the Memo Is WordWrap enabled, allowing long words to be carried on to the next line? Word Wrap: a logical flag to show whether or not word-wrap is enabled, ie if a word is close to the end of a line and is going to be too long for the line, it is wrapped down to the next line TEdit - an Edit Box: for entry or display of a single line of text. AutoSelected: if True, indicates that the edit control has just performed an AutoSelect operation

If True, indicates that the edit control has just performed an AutoSelect operation so that subsequent mouse-clicks and keystrokes proceed normally without selecting the text.

False is set when the edit control loses focus.

The action to be associated with this control

// standard properties, which should be supported by all descendants

The (default) action to be associated with this control

Can either read the action already associated with the control (GetAction), or write an action to be associated (SetAction)

Used to align the control in one of four directions.

// standard properties, which should be supported by all descendants

Either reads a flag containing alignment instructions (FAlign) or writes alignment instructions (SetAlign)

May have no alignment, may have custom or client alignment, or can be aligned to top, bottom, left or right

The set of anchor definitions for this control

// standard properties, which should be supported by all descendants

Determines how the control is to be anchored to its client or parent conrol

Either reads a flag containing the set of anchors to be used, or writes a set of anchors. If they have been written, this is indicated in IsAnchorsStored

Whether auto-size is to be used

// standard properties, which should be supported by all descendants

AutoSize permits the size of a control to be adjusted automatically, for example a button can become bigger or smaller to accommodate a longer or shorter caption.

Reads logical (boolean) flag to see whether auto-sizing is to be operated, or writes the flag to say it should be done. Default is false, ie no auto-sizing

TControlBiDiMode - enabling bi-directional writing Allows Languages such as Arabic and Hebrew to be used Determines the border spacing for this control

// standard properties, which should be supported by all descendants

Determines the border spacing for this control

Reads flag to find stored spacing values required for the border of the control, or writes the flag to set the spacing.

The properties are defined in the parent class TControlBorderSpacing

Determine the colour for the current control

// standard properties, which should be supported by all descendants

Reads the value for colour, or stores the value, and sets a flag if the colour is stored.

The default colour is the same as the window in which the control is located.

Determine Constraints (max and min height and width) for this control

// standard properties, which should be supported by all descendants

Determine Constraints (max and min height and width) for this control; reads the size constraints or stores new ones.

TEditCharCase - rules for what case to use (upper or lower) to display text

Indicates how text is displayed in a text editing control in the following ways:

Normal case letters
Upper case letters
Lower case letters

The rules can, of course, be overridden by use of the shift key.

DragCursor - the style of cursor to be used during the Drag process DragMode - whether manual or automatic EchoMode - how to echo keypresses on screen: normal (returning the actual character for that key), all upper or lower case, or a masking character as used in entering passwords Whether the control is Enabled. If not, it usually appears 'greyed-out'

// standard properties, which should be supported by all descendants

Whether the control is Enabled. If not, it usually appears 'greyed-out'

Reads a flag to see whether the control is enabled, or stores a new value. If stored, sets a flag to say so.

The Font to be used for text in this control

// standard properties, which should be supported by all descendants

Reads a flag to see what font should be used, or sets a flag to store it. If stored, sets a flag to say so

The properties of Font are defined in the parent class TFont

MaxLength: maximum length allowed for text string ParentBiDiMode - does the control follow the BiDiMode settings of its parent? OnChange - event handler for any change in text Event handler for a change in bounds of the control

// standard properties, which should be supported by all descendants

Reads or Writes flag if bounds are changed

Event Handler for mouse click

// standard properties, which should be supported by all descendants

Reads or writes a flag if a mouse click is detected, and sets a flag if a value is stored.

Event Handle for mouse double-click

Event handler for the Drag-Drop manoeuvre Event handler for the case when a control is dragged over another control Event handler when editing is done Event handler for the end of a dragging process OnEnter - event handler for when the mouse enters the control, and the control receives focus OnExit - event handler for when the mouse leaves the control and it loses focus OnKeyDown - event handler for instance when key is down while control has focus

OnKeyDown - event handler for instance when key is down while control has focus

Differs from OnKeyPress in that the key may have already been down when the control received focus; with OnKeyPress the key needs to become pressed while the control has focus.

OnKeyPress - event controller for a key being pressed while the control has focus

OnKeyPress - event controller for a key being pressed while the control has focus

Differs from OnKeyDown in that the key needs to become pressed while the control has focus; with OnKeyDown the key may have already been down when the control received focus.

OnKeyUp - event handler for instance when a key is up (not pressed) while the control has focus

The key may already have been up when the control received focus, or a pressed key may become released during the time the control has focus.

Event handler for when a mouse button is pressed down Event handler for mouse movement within the current control Event handler for when the mouse button is released, ie "up" Event Handler for resize of control // standard properties, which should be supported by all descendants
Reads or Writes flag if control is re-sized. Event handler for start of dragging process ParentFont - should the control use the same font as the parent? Default is true ParentShowHint - does the control adopt the same hinting behaviour as its parent? Default is true PasswordChar: the character which appears in the Edit box replacing and masking the actual character typed

PasswordChar : the character which appears in the Edit box replacing and masking the actual character typed.

Typically used in password input, to prevent the typed characters from being seen by passers-by or casual observers (or even malicious observers!)

PopupMenu - a context-sensitive menu that pops up when the right mouse button is clicked over this control // standard properties, which should be supported by all descendants
Reads the details of the pop-up menu, or stores them.
Properties are defined in the parent class TPopupMenu ReadOnly - the contents of the edit box may only be read, not written or erased Flag to determine: Is hint to be displayed for this control? // standard properties, which should be supported by all descendants
Reads flag or writes one to determine if a hint is to be shown when mouse hovers over this control. If value is stored, a storage flag is set. Display of the actual hint is controlled by OnShowHint TabStop - determines if the user can tab to a control.

Reads or writes boolean flag; default is False

Use the TabStop to allow or disallow access to the control using the Tab key.

If TabStop is True, the control is in the tab order. If TabStop is False, the control is not in the tab order and the user can't use the Tab key to move to the control.

The place this control occupies in the list of tabs Reads or writes information in flag; default is -1 Text: the character string contained in the Edit Box Text : the character string contained in the Edit Box Visible - can the control be seen?

The Visible property represents the ability to see a visual control. 
          If Visible is True the control is shown, otherwise it is hidden.
          Calling Show sets, among others, Visible to True.
          Setting Visible to False is equivalent to calling Hide method.

The Visible property does not depend on control's parent visibility. Use IsVisible method to consider this and get real visibility. TMemo - a box for entry or display of multiple lines of text

TMemo - a box for entry or display of multiple lines of text.

The textual data is held as an array of strings in Lines, where it can be edited

Used to align the control in one of four directions.

// standard properties, which should be supported by all descendants

Either reads a flag containing alignment instructions (FAlign) or writes alignment instructions (SetAlign)

May have no alignment, may have custom or client alignment, or can be aligned to top, bottom, left or right

Alignment - whether text is centered, left- or right-justified The set of anchor definitions for this control