Text to speech in Vista

Question

I did it by creating OLE object with Delphi in 2000/NT/XP as following:

Voice := CreateOLEObject('SAPI.SpVoice');
Voice.speak(...)

But this does not work in Vista, how can I make my program simply speak some text in Vista?

Answer 1

I just tried (D2009 on Vista Home Premium) with the following code and it works!

unit Unit1;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, StdCtrls, ComObj;

type
  TForm1 = class(TForm)
    Button1: TButton;
    procedure Button1Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}

procedure TForm1.Button1Click(Sender: TObject);
var
  Voice: Variant;
begin
  Voice := CreateOLEObject('SAPI.SpVoice');
  Voice.speak('Hello World');
end;

end.

FYI, there is a nice paper on using speech in Delphi programming by Brian Long...

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(Very) Late Update:

For why it might not work in Vista and give an EZeroDivide exception outside the IDE, see this other SO question: Delphi SAPI Text-To-Speech