Как использовать Microsoft Speech API?

// Works on NT, 2k, XP, Win9x with SAPI SDK
// reference & Further examples: See links below!
 
uses Comobj;
 
procedure TForm1.Button1Click(Sender: TObject);
var
  voice: OLEVariant;
begin
  voice := CreateOLEObject('SAPI.SpVoice');
  voice.Speak('Hello World!', 0);
end;

Взято с сайта https://www.swissdelphicenter.ch/en/tipsindex.php