通过标题模糊查找窗体并关闭窗口

       public static void CloseWindow(string title)

        {

            const int WM_CLOSE = 0x0010;

            IntPtr hWnd = FindWindow(title);

            if (hWnd != IntPtr.Zero)

            {

                SendMessage(hWnd, WM_CLOSE, 0, 0);

            }

        }

        //根据窗体标题查找窗口句柄（支持模糊匹配）

        public static IntPtr FindWindow(string title)

        {

            Process[] ps = Process.GetProcesses();

            foreach (Process p in ps)

            {

                if (p.MainWindowTitle.IndexOf(title) != -1)

                {

                    return p.MainWindowHandle;

                }

            }

            return IntPtr.Zero;

        }

        [DllImport("User32.dll", EntryPoint = "SendMessage")]

        private static extern int SendMessage(IntPtr hWnd, int Msg, int wParam, int lParam);

 如果是放在循环里，1s执行一次，上面的代码坏处是耗费CPU过高，在本人的机器上大约是1%-6%，本着能省则省的原则，如果知道进程的名字，耗费cpu可以更低

public static void CloseWindow(string title)

        {

           const int WM_CLOSE = 0x0010;

             IntPtr hWnd = FindWindow(title);

             if (hWnd != IntPtr.Zero)

             {

                 SendMessage(hWnd, WM_CLOSE, 0, 0);

             }

             Thread.Sleep(1000);

           

        }



        public static IntPtr FindWindow(string title)

        {

            var ps = Process.GetProcessesByName("ProcessName");

            if (ps.Length>0&&ps[0].MainWindowTitle.IndexOf(title) != -1)

            {

                return ps[0].MainWindowHandle;

            }

            return IntPtr.Zero;

        }