Использование Microsoft Speech API

Оформил: DeeCo

// 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;