CWnd::HiliteMenuItem
Visual Studio 2010
Highlights or removes the highlight from a top-level (menu-bar) menu item.
BOOL HiliteMenuItem( CMenu* pMenu, UINT nIDHiliteItem, UINT nHilite );
The MF_HILITE and MF_UNHILITE flags can be used only with this member function; they cannot be used with the CMenu::ModifyMenu member function.