WinCE 判断程序是否运行 如果运行则激活到前台窗口的线程

　　  [DllImport("coredll.Dll")]
        private static extern int ReleaseMutex(IntPtr hMutex);

        [DllImport("coredll.dll", EntryPoint = "CreateMutex", SetLastError = true)]
        public static extern IntPtr CreateMutex(IntPtr lpMutexAttributes, bool InitialOwner, string MutexName);

        const int ERROR_ALREADY_EXISTS = 0183;

        [DllImport("coredll.dll", EntryPoint = "FindWindowW", SetLastError = true)]
        public static extern IntPtr FindWindowCE(string lpClassName, string lpWindowName);

        [DllImport("coredll.dll")]
        public static extern bool SetForegroundWindow(IntPtr hWnd);

　　  #region Main
        /// <summary>
        /// 应用程序的主入口点。
        /// </summary>
        [MTAThread]
        static void Main()
        {
            string strAppName = System.Reflection.Assembly.GetExecutingAssembly().GetName().Name;
            IntPtr hMutex = CreateMutex(IntPtr.Zero, true, strAppName);

            if (Marshal.GetLastWin32Error() == ERROR_ALREADY_EXISTS)
            {
                ReleaseMutex(hMutex);
                MessageBox.Show("The application is running!");

                //通过Class找到对应的窗口句柄  #NETCF_AGL_BASE_ 为窗口的ClassName
                IntPtr mainWin = FindWindowCE("#NETCF_AGL_BASE_", null);
                //SetForegroundWindow函数将创建指定的窗口，并激活到前台窗口的线程
                bool result = SetForegroundWindow(mainWin);
                return;
            }

　　　　else
            {

　　　　　　　if (AppEntry.Login())
                        Application.Run(AppEntry.frmTmsOrderSearch);
                    else
                        Application.Exit();

　　　　}

　　}

WinCE Form的Class可以通过VS自带工具查看

Visual Studio Remote Tools->远程监视