Как программно переключить раскладку клавиатуры

Code:

procedure TForm1.Button1Click(Sender: TObject);

begin

ActivateKeyboardLayout(HKL_NEXT, 0);

end;

procedure TForm1.Button2Click(Sender: TObject);

begin

ActivateKeyboardLayout(LoadKeyboardLayout('00000419', 0), 0);

end;

procedure TForm1.Button3Click(Sender: TObject);

begin

ActivateKeyboardLayout(LoadKeyboardLayout('00000409', 0), 0);

end;

procedure TForm1.Timer1Timer(Sender: TObject);

var

s: array [0..63] of char;

begin

GetKeyboardLayoutName(s);

Form1.Caption := s;

end;