DOKK / manpages / debian 10 / allegro5-doc / al_is_mouse_installed.3alleg5.en
al_is_mouse_installed(3alleg5) al_is_mouse_installed(3alleg5)

al_is_mouse_installed - Allegro 5 API

#include <allegro5/allegro.h>
bool al_is_mouse_installed(void)
    

Returns true if al_install_mouse(3alleg5) was called successfully.

Allegro reference manual