al_grab_mouse - Man Page

#include <allegro5/allegro.h>

bool al_grab_mouse(ALLEGRO_DISPLAY *display)

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(3). It may lose the confined status at any time for other reasons.

al_ungrab_mouse(3)

al_ungrab_mouse(3).