Adding a Customozied 'More Windows...' Dialog to an MDI Application

To add a customized windows dialog to the windows menu, you just have to take only two following steps in the mainframe class...

  • Override InitPopupMenu and replace it with the following code :
    void CMainFrame::OnInitMenuPopup(CMenu* pPopupMenu, 
                                     UINT nIndex, 
                                     BOOL bSysMenu )
     CMDIFrameWnd::OnInitMenuPopup(pPopupMenu, nIndex, bSysMenu);
     // If the number of active windows is zero, the window submenu 
     // probably does'nt esists. If you have the window submenu present
     // even in zero child windows, remove this code.
     int nCount = 0;
     CWnd * pWnd = GetWindow (GW_CHILD);
     ASSERT (pWnd);
     pWnd = pWnd->GetWindow (GW_CHILD);
     while (pWnd)
      pWnd = pWnd->GetWindow (GW_HWNDNEXT);
     // The count is zero. exit.
     if ( nCount == 0 )
     // If it's a system menu, we don't need to handle that...
     if ( !bSysMenu )
      // The default handler places the "more windows" command in the 
      // submenu which contains IDs between AFX_IDM_FIRST_MDICHILD and 
      // AFX_IDM_LAST_MDICHILD, so check the popup for occurence of
      int nLength = pPopupMenu->GetMenuItemCount();
      for ( int i = 0; i < nLength; i++ ) 
       if ( pPopupMenu->GetMenuItemID( i ) == AFX_IDM_FIRST_MDICHILD )
        // Found. If the last item is already the "more windows"
        // command than remove it.
        if ( pPopupMenu->GetMenuItemID( nLength - 1 ) == 
         pPopupMenu->DeleteMenu( nLength - 1, MF_BYPOSITION );
        // Add our own window command.
        // Note : The ID must be - ( AFX_IDM_FIRST_MDICHILD +  
        // ( total number of entries in window list supported ) ). 
        // This saves us to make any default handler for the  
        // command, as the default procedure itself 
        // handles the command and sends it to the mainframe class.
                               AFX_IDM_FIRST_MDICHILD + DEFAULT_NUMBER_OF_MDIS,
                               "&Windows..." );
        // Done the processing.
  • Override OnCommand and replace it with the following code:
  • BOOL CMainFrame::OnCommand(WPARAM wParam, LPARAM lParam) 
     // If the command is "more windows" command call our 
     // own customized dialog
     if ( wParam == AFX_IDM_FIRST_MDICHILD + 9 )
      // Replace CWindowDlg with your own class
      CWindowDlg dlgWindowDlg;
      // OK. We handled the command so return true, 
      // as we don't want the default handler to 
      // handle this command too.
      return TRUE;
     return CMDIFrameWnd::OnCommand(wParam, lParam);


Download demo project - 22 Kb


  • There are no comments yet. Be the first to comment!

Leave a Comment
  • Your email address will not be published. All fields are required.

Top White Papers and Webcasts

  • Lenovo recommends Windows 8 Pro. "I dropped my laptop getting out of the taxi." This probably sounds familiar to most IT professionals. If your employees are traveling, you know their devices are in for a rough go. Whether it's a trip to the conference room or a convention out of town, any time equipment leaves a user's desk it is at risk of being put into harm's way. Stay connected at all times, whether at the office or on the go, with agile, durable, and flexible devices like the Lenovo® …

  • Moving from an on-premises environment to Office 365 does not remove the need to plan for disruptions or reduce the business risk requirements for protecting email services. If anything, some risks increase with a move to the cloud. Read how to ease the transition every business faces if considering or already migrating to cloud email. This white paper discusses: Setting expectations when migrating to Office 365 Understanding the implications of relying solely on Exchange Online security Necessary archiving …

Most Popular Programming Stories

More for Developers

RSS Feeds

Thanks for your registration, follow us on our social networks to keep up-to-date