al_find_menu - Allegro 5 API

       Searches  in  the  haystack  menu  for  any submenu with the given id.  (Note that this only represents a
       literal ID, and cannot be used as an index.)

       Returns the menu, if found.  Otherwise returns NULL.

       al_find_menu - Allegro 5 API

al_find_menu_item(3alleg5)

Allegro reference manual                                                                   al_find_menu(3alleg5)

       5.1.0

              #include <allegro5/allegro_native_dialog.h>

              ALLEGRO_MENU *al_find_menu(ALLEGRO_MENU *haystack, uint16_t id)