WPF收發windows訊息

WPF收發windows訊息2010-12-20 12:51

[System.Security.SuppressUnmanagedCodeSecurity]         [DllImport("User32.dll", CharSet = CharSet.Auto)]         public static extern bool PeekMessage(out Message msg, IntPtr hWnd, uint messageFilterMin, uint messageFilterMax, uint flags);         [DllImport("user32.dll", EntryPoint = "SendMessageA")]         private static extern int SendMessage(IntPtr hwnd, int wMsg, IntPtr wParam, string lParam);         [DllImport("user32.dll", CharSet = CharSet.Unicode)]         public static extern IntPtr PostMessage(IntPtr hwnd, int wMsg, IntPtr wParam, IntPtr lParam);   IntPtr hwnd;   private void WindowLoaded(object sender, EventArgs e) {   hwnd = new WindowInteropHelper(this).Handle; HwndSource.FromHwnd(hwnd).AddHook(new HwndSourceHook(WndProc));   } //接收windows訊息   private IntPtr WndProc(IntPtr hwnd, int msg, IntPtr wParam, IntPtr lParam, ref bool handled)         {             int WM_USER = 0x0400 + 111;             if (msg == WM_USER)             {                 //DecodeTouch(wParam, lParam);                string dicom_file = Marshal.PtrToStringAnsi(wParam);                  handled = true;                 f_OpenDicom(dicom_file);               }             return IntPtr.Zero;         } //發送windows訊息 private void f_send_msg(string filePath) {              IntPtr hwnd_IFC;             int WM_USER = 0x0400 + 111;             hwnd_IFC = hwnd;//尋找標題為frmPassive的表單控制代碼               UnicodeEncoding encode = new UnicodeEncoding();             char[] chars = encode.GetChars(encode.GetBytes(filePath));             Message msg;               msg = Message.Create(hwnd_IFC, WM_USER, Marshal.StringToHGlobalAnsi(filePath), new IntPtr(0));             PostMessage(msg.HWnd, msg.Msg, msg.WParam, msg.LParam);   }