C# 截屏代码

using System; using System.Collections.Generic; using System.Text; using System.Drawing; using System.Windows.Forms; namespace Screencap {     public class Capture     {         public enum CaptureTarget         {             Window,             Screen         }         public static Bitmap CaptureImage(CaptureTarget target, IntPtr windowHandle)         {             if (target == CaptureTarget.Window && windowHandle != IntPtr.Zero)             {                 Rectangle rect = GetWindowRect(windowHandle);