Vcl.ActnCtrls.TCustomButtonControl.MouseDown
Delphi
procedure MouseDown(Button: TMouseButton; Shift: TShiftState; X, Y: Integer); override;
C++
DYNAMIC void __fastcall MouseDown(System::Uitypes::TMouseButton Button, System::Classes::TShiftState Shift, int X, int Y);
Properties
| Type | Visibility | Source | Unit | Parent |
|---|---|---|---|---|
procedure function |
protected | Vcl.ActnCtrls.pas Vcl.ActnCtrls.hpp |
Vcl.ActnCtrls | TCustomButtonControl |
Description
OnMouseDown event dispatcher.
A control calls MouseDown in response to any of the Windows mouse-down messages (WM_LBUTTONDOWN, WM_MBUTTONDOWN, WM_RBUTTONDOWN), decoding the message parameters into the shift key state and position, which it passes in the Shift, X, and Y parameters, respectively. The value of the Button parameter indicates which mouse button was pressed: left, right, or middle.
The Button parameter determines which mouse button the user pressed. Shift indicates which shift keys (SHIFT, CTRL, or ALT) were down when the user pressed the mouse button. X and Y are the pixel coordinates of the mouse pointer within the client area of the control.