C# CommonOpenFileDialog.GetWindowHandle方法代码示例

        public void ShowFileOpenDialog()
        {
            string[] fileNames;
              List<Agent.KeyConstraint> constraints = new List<Agent.KeyConstraint>();
              if (mAgent is PageantClient) {
            // Client Mode with Pageant - Show standard file dialog since we don't
            // need / can't use constraints

            using (var openFileDialog = new OpenFileDialog()) {
              openFileDialog.Multiselect = true;
              openFileDialog.Filter = string.Join ("|",
            Strings.filterPuttyPrivateKeyFiles, "*.ppk",
            Strings.filterAllFiles, "*.*");

              var result = openFileDialog.ShowDialog ();
              if (result != DialogResult.OK) {
            return;
              }
              fileNames = openFileDialog.FileNames;
            }
              } else if (CommonOpenFileDialog.IsPlatformSupported) {
            // Windows Vista/7/8 has new style file open dialog that can be extended
            // using the Windows API via the WindowsAPICodepack library

            var win7OpenFileDialog = new CommonOpenFileDialog ();
            win7OpenFileDialog.Multiselect = true;
            win7OpenFileDialog.EnsureFileExists = true;

            var confirmConstraintCheckBox =
              new CommonFileDialogCheckBox (cConfirmConstraintCheckBox,
              "Require user confirmation");
            var lifetimeConstraintTextBox =
              new CommonFileDialogTextBox (cLifetimeConstraintTextBox, string.Empty);
            lifetimeConstraintTextBox.Visible = false;
            var lifetimeConstraintCheckBox =
              new CommonFileDialogCheckBox (cLifetimeConstraintCheckBox,
              "Set lifetime (in seconds)");
            lifetimeConstraintCheckBox.CheckedChanged +=
              delegate(object aSender, EventArgs aEventArgs) {
              lifetimeConstraintTextBox.Visible =
              lifetimeConstraintCheckBox.IsChecked;
            };

            var confirmConstraintGroupBox = new CommonFileDialogGroupBox ();
            var lifetimeConstraintGroupBox = new CommonFileDialogGroupBox ();

            confirmConstraintGroupBox.Items.Add (confirmConstraintCheckBox);
            lifetimeConstraintGroupBox.Items.Add (lifetimeConstraintCheckBox);
            lifetimeConstraintGroupBox.Items.Add (lifetimeConstraintTextBox);

            win7OpenFileDialog.Controls.Add (confirmConstraintGroupBox);
            win7OpenFileDialog.Controls.Add (lifetimeConstraintGroupBox);

            var filter = new CommonFileDialogFilter (
              Strings.filterPuttyPrivateKeyFiles, "*.ppk");
            win7OpenFileDialog.Filters.Add (filter);
            filter = new CommonFileDialogFilter (Strings.filterAllFiles, "*.*");
            win7OpenFileDialog.Filters.Add (filter);

            win7OpenFileDialog.FileOk += win7OpenFileDialog_FileOk;

            /* add help listeners to win7OpenFileDialog */

            // declare variables here so that the GC does not eat them.
            WndProcDelegate newWndProc, oldWndProc = null;
            win7OpenFileDialog.DialogOpening += (sender, e) =>
            {
              var hwnd = win7OpenFileDialog.GetWindowHandle();

              // hook into WndProc to catch WM_HELP, i.e. user pressed F1
              newWndProc = (hWnd, msg, wParam, lParam) =>
              {
            const short shellHelpCommand = 0x7091;

            var win32Msg = (Win32Types.Msg)msg;
            switch (win32Msg) {
              case Win32Types.Msg.WM_HELP:
                var helpInfo = (HELPINFO)Marshal.PtrToStructure(lParam, typeof(HELPINFO));
                // Ignore if we are on an unknown control or control 100.
                // These are the windows shell control. The help command is
                // issued by these controls so by not ignoring, we would call
                // the help method twice.
                if (helpInfo.iCtrlId != 0 && helpInfo.iCtrlId != 100)
                  OnAddFromFileHelpRequested(win7OpenFileDialog, EventArgs.Empty);
                return (IntPtr)1; // TRUE
              case Win32Types.Msg.WM_COMMAND:
                var wParamBytes = BitConverter.GetBytes(wParam.ToInt32());
                var highWord = BitConverter.ToInt16(wParamBytes, 0);
                var lowWord = BitConverter.ToInt16(wParamBytes, 2);
                if (lowWord == 0 && highWord == shellHelpCommand) {
                  OnAddFromFileHelpRequested(win7OpenFileDialog, EventArgs.Empty);
                  return (IntPtr)0;
                }
                break;
            }
            return CallWindowProc(oldWndProc, hwnd, msg, wParam, lParam);
              };
              var newWndProcPtr = Marshal.GetFunctionPointerForDelegate(newWndProc);
              var oldWndProcPtr = SetWindowLongPtr(hwnd, WindowLongFlags.GWL_WNDPROC, newWndProcPtr);
              oldWndProc = (WndProcDelegate)
//.........这里部分代码省略.........