Оформил: DeeCo
Автор: http://www.swissdelphicenter.ch

function GetScreenSaverTimeout: Integer;
 begin
   SystemParametersInfo(SPI_GETSCREENSAVETIMEOUT, 0, @Result, 0);
 end;

 procedure TForm1.Button1Click(Sender: TObject);
 begin
   ShowMessage(IntToStr(GetScreenSaverTimeout) + ' Sec.');
 end;