Allegro 5 api
#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(3alleg5). It may lose the confined status at any time for other reasons.
Note: not yet implemented on Mac OS X.
al_ungrab_mouse(3alleg5)