[Overview][Constants][Types][Classes][Procedures and functions][Index] Reference for unit 'StdCtrls' (#lcl)


[Properties (by Name)] [Methods (by Name)] [Events (by Name)]

A label with a box which can contain a check mark.


Source position: stdctrls.pp line 1233

type TCheckBox = class(TCustomCheckBox)


  constructor Create(); override;


  property Action;


The Action associated with this control.

  property Align;


Specifies the placement of the control inside its Parent.

  property AllowGrayed;


Allows the check box to be in a "grayed" state.

  property Anchors;


The set of anchor definitions for this control.

  property AutoSize;


Allows to automatically adjust the size of the control, according to its content.

  property BidiMode;


Customization (of text controls) in bidirectional reading environments.

  property BorderSpacing;


Determines the inner and outer border spacing for this control.

  property Caption;


The text describing the control to the user.

  property Checked;


The state of the check mark. Here always False, can be implemented in derived classes.

  property Color;


The background color of the control.

  property Constraints;


The minimal and maximal Width and Height of this control.

  property DragCursor;


The cursor shape shown while the control is dragged.

  property DragKind;


The operation when the control is dragged - Drag or Dock.

  property DragMode;


Allows the user to drag the control.

  property Enabled;


Determines whether the control reacts on mouse or keyboard input.

  property Font;


The font to be used for text display in this control.

  property Hint;


The text to show in the Hint window for this control.

  property OnChange;


Handler for any change in properties of the control.

  property OnChangeBounds;


Event handler for a change of the Bounds of the control.

  property OnClick;


Notification handler for mouse clicks.

  property OnContextPopup;


Invoked when a context-sensitive pop-up menu is requested.

  property OnDragDrop;


This handler determines the action on an drop onto this control, in a drag-drop operation.

  property OnDragOver;


Event handler for a control being dragged over this control.

  property OnEditingDone;


Event handler when editing is done.

  property OnEndDrag;


Notification handler for the end of a dragging operation.

  property OnEnter;


Handler for control receiving the focus.

  property OnExit;


Handler for control loosing the focus. This is a good place for checking the finished user input.

  property OnKeyPress;


Handler for a character entered by the user.

  property OnKeyDown;


Handler for keyboard key pressed.

  property OnKeyUp;


Handler for keyboard key released.

  property OnMouseDown;


Event handler for mouse button going down.

  property OnMouseEnter;


Event handler for mouse entering the area of the control.

  property OnMouseLeave;


Event handler for mouse leaving the area of the control.

  property OnMouseMove;


Event handler for mouse movement within the control.

  property OnMouseUp;


Event handler for mouse button going up.

  property OnResize;


Notification handler for a resize of the control.

  property OnStartDrag;


Event handler for the start of a dragging operation.

  property OnUTF8KeyPress;


Handler for a character entered by the user.

  property ParentColor;


If true, the Color of the control will be the same as the one from the Parent. Default is true.

  property ParentFont;


If true, the Font of the control will be the same as the one from the Parent. Default is true.

  property ParentShowHint;


If true, the value of ShowHint for the control will be the same as the one from the Parent. Default is true.

  property ParentBidiMode;


Allows to use the BiDiMode settings of Parent. Default is true.

  property PopupMenu;


A context-sensitive menu that pops up when the right mouse button is clicked over this control

  property ShowHint;


Enables the Hint display.

  property State;


Indicates whether the check box is checked (selected), unchecked (deselected) or grayed (disabled).

  property TabOrder;


Determines the sequence of controls, reachable when the user presses the Tab key.

  property TabStop;


Allows the user to navigate to this control, by pressing the Tab key.

  property Visible;


Allows to show or hide the control, and all of its children.





A label with a box which can contain a check mark.




The base class for checkbox components.




The base class for various button controls.




The base class for controls which can contain other (child) controls.




The base class for visible controls.




The base class for LCL components associated with widgets.







See also



How to use StdCtrls, ComCtrls or ExtCtrls

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