Wpf发送接收 win32消息

#region WPF发送和接收win32消息
        public const int WM_GETTEXT = 0x0D;
        public const int WM_SETTEXT = 0x0C;
        public const int WM_SIZEING = 0x0214;
        public const int WM_COPYDATA = 0x004A;
        public const int WM_LBUTTONDBLCLK = 0x0203;

        public struct Win32Message
        {
            public IntPtr dwData;
            public int cbData;
            [MarshalAs (UnmanagedType.LPStr)]
            public string lpData;
        }

        [DllImport("user32.dll")]
        private static extern int SendMessage(IntPtr hWnd, int Msg, int wParam, ref Win32Message lParam);

        /// <summary>
        /// 返回wpf主窗体句柄
        /// </summary>
        /// <param name="processName">wpf进程名</param>
        /// <returns></returns>
        public static IntPtr  GetWpfMainwindowHandel(string processName)
        {
            return Process.GetProcesses().FirstOrDefault(t => t.ProcessName.Contains(processName))?.MainWindowHandle??IntPtr.Zero;
        }
        /// <summary>
        /// 发送win32消息给wpf窗口
        /// </summary>
        /// <param name="wpfWinHandel">窗口句柄</param>
        /// <param name="message">字符串消息</param>
        public static void SendWin32MessageToWpfWindow(IntPtr wpfWinHandel,string message )
        {
            if (wpfWinHandel != IntPtr.Zero)
            {
                var param = new Win32Message
                {
                    dwData = (IntPtr),
                    cbData = System.Text.Encoding.Default.GetBytes(message).Length,
                    lpData = message,
                };
                SendMessage(wpfWinHandel, WM_COPYDATA, , ref param);
            }
            else
            {
                Console.WriteLine("wpf窗口句柄为zero");
            }
        }

        /// <summary>
        /// wpf窗口订阅win32消息
        /// </summary>
        /// <param name="window">wpf窗口</param>
        /// <param name="action">接收到win32消息时要处理的action</param>
        public static void SubWin32Message(System.Windows.Window window,Action<string> action)
        {
            WindowInteropHelper win = new WindowInteropHelper(window);
            HwndSource hwndSource = HwndSource.FromHwnd(win.Handle);
            hwndSource.AddHook((IntPtr hwnd,int msg,IntPtr wparam,IntPtr iparam,ref bool handel)=>
            {
　　　　　　　　　 if ( msg == WM_COPYDATA )
　　　　　　　　　　{
　　　　　　　　　　　　 Win32Message m = (Win32Message)Marshal.PtrToStructure(iparam, typeof(Win32Message)); 
　　　　　　　　　　　　action?.Invoke(m.lpData);
　　　　　　　　　　}
　　　　　　　　　return IntPtr.Zero; 
　　　　　　　}); 
　　　　　} 

#endregion