Convert Jpeg-file to bmp-file

Button1Click procedure creates variable of TJPEGImage type and loads a picture stored in a file. Button2Click procedure creates variable of TBitmap type and sets jpeg object to this variable. s uses JPEG; ... var JPEGImage: TJPEGImage; ... procedure TForm1.Button1Click(Sender: TObject); begin JPEGImage:=TJPEGImage.Create; if OpenDialog1.Execute then begin JPEGImage.LoadFromFile(OpenDialog1.FileName); Image1.Canvas.Draw(0,0,JPEGImage); end; end;

procedure TForm1.Button2Click(Sender: TObject);
var
  Bitmap: TBitmap;
begin
  try
    Bitmap:=TBitmap.Create;
    with Bitmap do
    begin
      PixelFormat:=pf24bit;
      Height:=JPEGImage.Height;
      Width:=JPEGImage.Width;
      Canvas.Draw(0,0, JPEGImage);
    end;
    if SaveDialog1.Execute then
      Bitmap.SaveToFile(SaveDialog1.FileName);
    Label1.Caption:='Convertation finised';
  finally
    Bitmap.Free;
    JPEGImage.Free;
  end;
end;