Как сохранить веб страничку в Bitmap

procedure TForm1.Button1Click(Sender: TObject);
var
  ViewObject: IViewObject;
  sourceDrawRect: TRect;
begin
  if EmbeddedWB1.Document <> nil then
  try
    EmbeddedWB1.Document.QueryInterface(IViewObject, ViewObject);
    if ViewObject <> nil then
      try
        sourceDrawRect := Rect(0, 0, Image1.Width, Image1.Height);
        ViewObject.Draw(DVASPECT_CONTENT, 1, nil, nil, Self.Handle,
          image1.Canvas.Handle, @sourceDrawRect, nil, nil, 0);
      finally
        ViewObject._Release;
      end;
  except
  end;
end;