Vcl.Controls.TWinControl.WndProc

• Up to Parent: TWinControl

Delphi

procedure WndProc(var Message: TMessage); override;

C++

virtual void __fastcall WndProc(Winapi::Messages::TMessage &Message);

Properties

Type	Visibility	Source	Unit	Parent
procedure function	protected	Vcl.Controls.pas Vcl.Controls.hpp	Vcl.Controls	TWinControl

Description

Provides specific message responses for the control.

Override WndProc to change the initial Windows message handler for the control. The WindowProc property is initialized to point to the WndProc method.

WndProc for TWinControl overrides the inherited method to define responses for focus, mouse, and keyboard messages. It sends all others to its inherited WndProc.

When overriding WndProc to provide specialized responses to messages, call the inherited WndProc at the end to dispatch any unhandled messages.

See Also

• DefWndProc

• MainWndProc

• WndProc

• WindowProc

Code Examples

• SubClassWndProc (Delphi)
• SubClassWndProc (C++)