INFO: Using Accelerators with an MFC Modeless Dialog Box

   // .h file with your derived CDialog class.
   class CModeless : public CDialog
   {
      .
    public:
      virtual BOOL PreTranslateMessage(MSG*);
      .
   };

   //.cpp file.
   BOOL CModeless::PreTranslateMessage(MSG* pMsg)
   {
      HACCEL hAccel =
      ((CMainFrame*)AfxGetApp()->m_pMainWnd)->GetAccelTable();
      if(!(hAccel &&
           ::TranslateAccelerator(AfxGetApp()->m_pMainWnd->m_hWnd, hAccel,
                                  pMsg)))
           return CDialog::PreTranslateMessage(pMsg);
      else
         return TRUE;
   }

   // Mainfrm.h file, where CMainFrame is the main window class.
   HACCEL CMainFrame::GetAccelTable() { return m_hAccelTable; }