摘要：
代码如下，将一张图绘制到窗口上，结果只有一个全黑的矩形：1 Bitmap bmp = (Bitmap)Bitmap.FromFile(@"C:\Users\Ken\Desktop\Load2.bmp"); 2 Graphics grDest = Graphics.FromHwnd(pictureBox1.Handle); 3 Graphics grSrc = Graphics.FromImage(bmp); 4 IntPtr hdcDest = grDest.GetHdc(); 5 IntPtr hdcSrc = grSrc.GetHdc(); 6 BitBlt(hdcDe 阅读全文