...die Microsoft Speech API verwenden?

[Clane]

Delphi-Quellcode:

// Works on NT, 2k, XP, Win9x with SAPI SDK
uses Comobj;

procedure TForm1.Button1Click(Sender: TObject);
var
  voice: OLEVariant;
begin
  voice := CreateOLEObject('SAPI.SpVoice');
  voice.Speak('Hello World!', 0);
end;

Anstatt "Hello World" eeinfach das eintragen was euch die Windows API sagen soll ;)