CWnd* pMain = AfxGetMainWnd(); 
    if (pMain != NULL) 
    { 
       CMenu* pMenu = pMain->GetMenu(); 
       for(int iBar = pMenu->GetMenuItemCount()-1; iBar>=0; iBar--) 
       { 
          pMenu->DeleteMenu(iBar, MF_BYPOSITION); 
          pMain->DrawMenuBar(); 
       } 
    }