HiliteMenu
HiliteMenu Highlight or unhighlight a menu title
#include <Menus.h> Menu Manager
void HiliteMenu(menuID );
short menuID ; ID of a menu to highlight (0=unhighlight any)
HiliteMenu highlights the specified menu title or unhighlights any menu
currently highlighted.
menuID is the menuID parameter from a previous NewMenu or a resource
ID of a menu obtained via GetMenu. A value of 0 (or any other
invalid ID) causes the currently-highlighted menu title to be
unhighlighted.
Returns: none

Notes: Use HiliteMenu(0) after calling MenuSelect or MenuKey. The
normal sequence is to leave the title highlighted while the action is taking
place and unhighlight it as soon as it is finished. For lengthy operations,
(e.g., reading a file), you should temporarily set the mouse cursor to a
watch (see SetCursor).
Using this command to explicitly highlight a menu title is rare since
highlighting is performed implicitly by the menu selection tools.
The global variable TheMenu always contains the ID of the menu that is
currently highlighted, or 0 if none is.