Modificare dinamicamente la barra dei menu

[misturas]

Ciao a tutti,
lavoro con Visual C++,e ho un problema
Non riesco a trovare documentazione esaustiva sulla rete e i libri della microsoft non mi sono ancora arrivati...Mond@d#rI di merda!!!!
Come si cambia a run time la barra dei menu?
(Settare una voce di menù come grayed,aggiungere una voce,modificare il testo di una voce di menù etc..)
Mi basta un riferimento alla documentazione,anche se un aiutino non guasta!!
PLEASE HELP ME!

[cionci]

Dipende...con o senza MFC ?

[cionci]

Questo è un esempio che si trova su MSDN:

// CMainFrame::OnChangeFileMenu() is a menu command handler for 
// CMainFrame class, which in turn is a CFrameWnd-derived class. 
// It modifies the File menu by inserting, removing and renaming 
// some menu items. Other operations include associating a context 
// help id and setting default menu item to the File menu. 
// CMainFrame is a CFrameWnd-derived class.
void CMainFrame::OnChangeFileMenu() 
{
   // Get the menu from the application window.
   CMenu* mmenu = GetMenu();

   // Look for "File" menu.
   int pos = FindMenuItem(mmenu, "&File");
   if (pos == -1)
      return;

   // Remove "New" menu item from the File menu.
   CMenu* submenu = mmenu->GetSubMenu(pos);
   pos = FindMenuItem(submenu, "&New\tCtrl+N");
   if (pos > -1)
      submenu->RemoveMenu(pos, MF_BYPOSITION);

   // Look for "Open" menu item from the File menu. Insert a new
   // menu item called "Close" right after the "Open" menu item.
   // ID_CLOSEFILE is the command id for the "Close" menu item.
   pos = FindMenuItem(submenu, "&Open...\tCtrl+O");
   if (pos > -1)
      submenu->InsertMenu(pos + 1, MF_BYPOSITION, ID_CLOSEFILE, "&Close");

   // Rename menu item "Save" to "Save Selection".
   pos = FindMenuItem(submenu, "&Save\tCtrl+S");
   if (pos > -1)
   {
      UINT id = submenu->GetMenuItemID(pos);
      submenu->ModifyMenu(id, MF_BYCOMMAND, id, "&Save Selection");
   }

   // Associate a context help ID with File menu, if one is not found.
   // ID_FILE_CONTEXT_HELPID is the context help ID for the File menu
   // that is defined in resource file. 
   if (submenu->GetMenuContextHelpId() == 0)
      submenu->SetMenuContextHelpId(ID_FILE_CONTEXT_HELPID);

   // Set "Open" menu item as the default menu item for the File menu, 
   // if one is not found. So, when a user double-clicks the File
   // menu, the system sends a command message to the menu owner 
   // window and closes the menu as if the File\Open command item had 
   // been chosen. 
   if (submenu->GetDefaultItem(GMDI_GOINTOPOPUPS, TRUE) == -1)
   {
      pos = FindMenuItem(submenu, "&Open...\tCtrl+O");
      submenu->SetDefaultItem(pos, TRUE);
   }
}

// FindMenuItem() will find a menu item string from the specified
// popup menu and returns its position (0-based) in the specified 
// popup menu. It returns -1 if no such menu item string is found.
int FindMenuItem(CMenu* Menu, LPCTSTR MenuString)
{
   ASSERT(Menu);
   ASSERT(::IsMenu(Menu->GetSafeHmenu()));

   int count = Menu->GetMenuItemCount();
   for (int i = 0; i < count; i++)
   {
      CString str;
      if (Menu->GetMenuString(i, str, MF_BYPOSITION) &&
         (strcmp(str, MenuString) == 0))
         return i;
   }

   return -1;
}