_jpg1.Load(_T("D:\\1.jpg"));
_jpg2.Load(_T("D:\\2.jpg"));
int w1 = _jpg1.GetWidth();
int w2 = _jpg2.GetWidth();
int h1 = _jpg1.GetHeight();
int h2 = _jpg2.GetHeight();
int bpp = _jpg1.GetBpp();
_jpg3.Create(w1+w2,h2,bpp);
_jpg3.MixFrom(_jpg1,0,0);
_jpg3.MixFrom(_jpg2,w1,0);