Control handles user-defined message?

unit MyControl;

interface

uses
  Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs;

type
  TMyControl = class(TControl)
  private
    { Private declarations }
  protected
    { Protected declarations }
    procedure WMOwndefine(var Msg:TMessage);message wm_user+1;
  public
    { Public declarations }
  published
    { Published declarations }
  end;

procedure Register;

implementation

procedure Register;
begin
  RegisterComponents('Sample', [TMyControl]);
end;

{ TMyControl }

procedure TMyControl.WMOwndefine(var Msg: TMessage);
begin
  //do what you want
end;

end.

That is exactly what I am doing, however it didn't 'do what I want'.
When I define the same definition as above for the form   (i.e. TForm1.WMOwndef(var msg:TMessage);message WM_USER+2;)  I am able to respond from within TForm1.WMOwndef, but the component isn't able to do it ..

or you can use
postmessage(hwnd_broadcast,wm_user+1,0,0);
to sendmessage .