Активизация или отключение автоматического проигрывания CD

Code:

uses

  Registry;

procedure CDSetAutoPlay(SioNo: Boolean);

var

  Reg: TRegistry;

begin

  try

    Reg := TRegistry.Create;

    Reg.RootKey := HKEY_LOCAL_MACHINE;

    if Reg.KeyExists('Software\Classes\AudioCD\') then

      if Reg.OpenKey('Software\Classes\AudioCD\Shell\', False) then

        if SioNo then Reg.WriteString('', 'play')

        else

           Reg.WriteString('', '');

  finally

    Reg.Free;

  end;

end;

procedure TForm1.Button1Click(Sender: TObject);

begin

  {Activate  AutoPlay}

  CDSetAutoPlay(True);

end;

procedure TForm1.Button2Click(Sender: TObject);

begin

  {Deactivate Autoplay}

  CDSetAutoPlay(False);

end;