FIX: IDocHostUIHandler Not Queried for CLSID_WebBrowser_V1

MORE INFORMATION

CLSID_WebBrowser and CLSID_WebBrowser_V1 Differences

The WebBrowser control can be created using either the CLSID_WebBrowser or CLSID_WebBrowser_V1 class identifier and supports both the Internet Explorer 3.0x and 4.0x interfaces. The latter provides a mode compatible with Internet Explorer 3.0x by exposing those interfaces as default:

   Class ID             Default Interface  Default Event Interface
   -----------------    -----------------  -----------------------
   CLSID_WebBrowser     IWebBrowser2       DWebBrowserEvents2
   CLSID_WebBrowser_V1  IWebBrowser        DWebBrowserEvents
				

Replacing the Context Menu

If you are implementing the IDocHostUIHandler interface to replace the Internet Explorer context menu, and the host application is using the Microsoft Foundation Classes (MFC), you can override the default CWinApp implementation of PreTranslateMessage as follows.

Use this code in your CWinApp-derived class:

   BOOL CMyApp::PreTranslateMessage(MSG* pMsg)
   {

      if ( WM_RBUTTONDOWN   == pMsg->message
        || WM_RBUTTONDBLCLK == pMsg->message )
      {
         // Received right-click (dbl)
         CWnd* pFrame = AfxGetMainWnd();

         CMyView* pView =
            ((CMyView*)((CFrameWnd*)pFrame)->GetActiveView());

         if ( pView->IsWebBrowser( pMsg->hwnd ) )
         {
            // The WebBrowser control was clicked
            pView->DoContextMenu();
            return TRUE;
         }
      }
      return CWinApp::PreTranslateMessage(pMsg);

   }
				

Use this code in the MFC view class that hosts the WebBrowser control:

   void CMyView::DoContextMenu()
   {
      CMenu  Menu;
      CMenu* pPopup = NULL;
      POINT  pt;

      DWORD pos = GetMessagePos();
      pt.x = LOWORD(pos);
      pt.y = HIWORD(pos);

      Menu.LoadMenu( IDR_MAINFRAME );   // Your menu here.
      pPopup = Menu.GetSubMenu( 0 );
      if ( pPopup )
      {
         pPopup->TrackPopupMenu( TPM_LEFTALIGN|TPM_RIGHTBUTTON,
                                 pt.x, pt.y, this );
         pPopup->DestroyMenu();
         Menu.DestroyMenu();
      }

   }

   static TCHAR gszIEClass[] = "Internet Explorer_Server";

   // Checks if message window is WebBrowser control.
   // Also works with nested frames.
   BOOL CMyView::IsWebBrowser(HWND hWnd)
   {
      HWND hWndWBOC = (HWND)m_Browser.GetSafeHwnd();
      HWND hWndParent;

      hWndParent = GetParentWBOC( hWnd );

      while ( hWndParent != hWndWBOC
           && hWndParent != NULL )
      {
         hWndParent = GetParentWBOC( ::GetParent( hWndParent ) );
      }

      return (hWndParent != NULL);

   }

   HWND CMyView::GetParentWBOC(HWND hWnd)
   {

      TCHAR   szClass[sizeof(gszIEClass)+1];
      HWND   hWndParent;

      ::GetClassName( hWnd, szClass, sizeof(szClass) );

      if ( 0 == _tcscmp( szClass, gszIEClass ) )
      {
         // InternetExplorer_Server
         hWndParent = ::GetParent( hWnd );   // Shell DocObject View
         return ::GetParent( hWndParent );   // Shell Embedding
      }
      else
      {
         return NULL;
      }

   }