1、启动VS2013，新建C#->WinForm项目，命名为Cs窗口截图，如下图：
2、在窗体中添加控件并布局，如下图：
3、添加Win32Api引用，源代码见参考资料。
4、添加PrtWnd类，用于截取给定句柄的窗口，代码：pub盟敢势袂lic class PrtWnd { public stat足毂忍珩ic Bitmap PrtWindow(IntPtr hWnd) { IntPtr hscrdc =Win32Api.GetWindowDC(hWnd); Win32Api.RECT rect; Win32Api.GetWindowRect(hWnd,out rect); IntPtr hbitmap =Win32Api.CreateCompatibleBitmap(hscrdc, rect.right-rect .left , rect .bottom -rect .top ); IntPtr hmemdc =Win32Api.CreateCompatibleDC(hscrdc); Win32Api.SelectObject(hmemdc, hbitmap); Win32Api. PrintWindow(hWnd, hmemdc, 0); Bitmap bmp = Bitmap.FromHbitmap(hbitmap); Win32Api .DeleteDC(hscrdc); Win32Api.DeleteDC(hmemdc); return bmp; } }
5、在Form1的Btton单击事件中添加代码：private void button1_Click(o芟鲠阻缒bject sender, EventArgs e) { IntPtr handle=IntPtr .Zero ; try { handle = Win32Api.FindWindow(null, textBox1.Text); PB.Image = PrtWnd.PrtWindow(handle); } catch (Exception) { MessageBox.Show("悲剧……可能哪里出错了。|"+handle .ToString()); } }
6、调试运行，结果如下图：
