c#实现winform屏幕截图并保存的示例

代码如下:using System.Runtime.InteropServices;using System.Drawing.Imaging;    [System.Runtime.InteropServices.DllImportAttribute(“gdi32.dll”)]    private static extern bool BitBlt(                     IntPtr hdcDest,   //   目标   DC的句柄                       int nXDest,                    int nYDest,