コード例 #1
0
        private IntPtr WndProc(IntPtr hwnd, int msg, IntPtr wParam, IntPtr lParam, ref bool handled)
        {
            if (msg == NativeMethods.WM_COPYDATA)
            {
                NativeMethods.COPYDATASTRUCT copyData = (NativeMethods.COPYDATASTRUCT)Marshal.PtrToStructure(lParam, typeof(NativeMethods.COPYDATASTRUCT));
                int dataType = (int)copyData.dwData;
                if (dataType == 2)
                {
                    string filename = Marshal.PtrToStringAnsi(copyData.lpData);

                    // Add the file name to the user control
                    AddEmlFile(filename);
                }
                else
                {
                    MessageBox.Show("Unrecognized data type = " + dataType);
                }
            }
            return(IntPtr.Zero);
        }
コード例 #2
0
ファイル: App.xaml.cs プロジェクト: yashbajra/EmlReader
        private void Application_Startup(object sender, StartupEventArgs e)
        {
            if (e.Args.Length != 1)
            {
                MessageBox.Show("File name not specified." + Environment.NewLine + "Usage <executable> <emlfile>");
                Environment.Exit(1);
            }
            var file = e.Args[0];

            if (!File.Exists(file))
            {
                MessageBox.Show("File not found. " + Environment.NewLine + file);
                Environment.Exit(2);
            }

            bool  isNewInstance;
            Mutex singleMutex = new Mutex(true, "MyAppMutex", out isNewInstance);

            if (isNewInstance)
            {
                // Start the form with the file name as a parameter
                var mainWindow = new MainWindow(file);
                mainWindow.ShowDialog();
                mainWindow.Close();
            }
            else
            {
                string windowTitle = "View Emls";
                // Find the window with the name of the main form
                IntPtr ptrWnd = NativeMethods.FindWindow(null, windowTitle);
                if (ptrWnd == IntPtr.Zero)
                {
                    MessageBox.Show("No window found with the title " + windowTitle);
                }
                else
                {
                    IntPtr ptrCopyData = IntPtr.Zero;
                    try
                    {
                        // Create the data structure and fill with data
                        NativeMethods.COPYDATASTRUCT copyData = new NativeMethods.COPYDATASTRUCT();
                        copyData.dwData = new IntPtr(2);    // Just a number to identify the data type
                        copyData.cbData = file.Length + 1;  // One extra byte for the \0 character
                        copyData.lpData = Marshal.StringToHGlobalAnsi(file);

                        // Allocate memory for the data and copy
                        ptrCopyData = Marshal.AllocCoTaskMem(Marshal.SizeOf(copyData));
                        Marshal.StructureToPtr(copyData, ptrCopyData, false);

                        // Send the message
                        NativeMethods.SendMessage(ptrWnd, NativeMethods.WM_COPYDATA, IntPtr.Zero, ptrCopyData);
                    }
                    catch (Exception ex)
                    {
                        MessageBox.Show(ex.ToString());
                    }
                    finally
                    {
                        // Free the allocated memory after the contol has been returned
                        if (ptrCopyData != IntPtr.Zero)
                        {
                            Marshal.FreeCoTaskMem(ptrCopyData);
                        }
                    }
                }
                Environment.Exit(1);
            }
        }