al_grab_mouse - Allegro 5 API

       Confine the mouse cursor to the given display.  The mouse cursor can only be confined to one display at a
       time.

       Returns  true if successful, otherwise returns false.  Do not assume that the cursor will remain confined
       until you call al_ungrab_mouse(3alleg5).  It may lose the confined status at any time for other reasons.

              Note: not yet implemented on Mac OS X.

       al_grab_mouse - Allegro 5 API

al_ungrab_mouse(3alleg5)

Allegro reference manual                                                                  al_grab_mouse(3alleg5)

              #include <allegro5/allegro.h>

              bool al_grab_mouse(ALLEGRO_DISPLAY *display)