windows mobile 只能运行一个程序实例

static class Program
    {
        [System.Runtime.InteropServices.DllImport("coredll.Dll", SetLastError = true)]
        private static extern int ReleaseMutex(IntPtr hMutex);

        [System.Runtime.InteropServices.DllImport("coredll.Dll", SetLastError = true)]
        private static extern IntPtr CreateMutex(string lpMutexAttributes, bool bInitialOwner, string lpName);
        /// <summary>
        /// 应用程序的主入口点。
        /// </summary>
        [MTAThread]
        static void Main()
        {
            try
            {
                IntPtr hMutex = CreateMutex(null, false, "XXXXX");
                if (System.Runtime.InteropServices.Marshal.GetLastWin32Error() != 0183)
                {
                    Application.Run(new FrmMain());
                }
                else
                {
                    MessageBox.Show("程序已经运行.", "提示", MessageBoxButtons.OK, MessageBoxIcon.Asterisk, MessageBoxDefaultButton.Button1);
                    ReleaseMutex(hMutex);
                }
            }
            catch (Exception)
            {

                MessageBox.Show("发生未知错误,程序退出！");
                Application.Exit();
            }

        }
    }