>操作JPEG图片的控件:
其实DELPHI自带的Image控件完全可以满足你的要求的.
比如打开一幅JPG图片:
uses Jpeg;//注意
procedure TForm1.Button1Click(Sender: TObject);
var
bmp :TBitmap;
jpg :TJpegImage;
begin
if OpenPictureDialog1.Execute then
begin
jpg :=TJpegImage.Create;
jpg.LoadFromFile(OpenPictureDialog1.FileName);
bmp :=TBitmap.Create;
bmp.Assign(jpg);
Image1.Picture.Bitmap.Assign(bmp);
bmp.Free;
jpg.Free;
end;
end;