man install_timer () - Installs the Allegro timer interrupt handler.
NAME
install_timer - Installs the Allegro timer interrupt handler.
SYNOPSIS
#include <allegro.h>
int install_timer();
DESCRIPTION
Installs the Allegro timer interrupt handler. You must do this before installing any user timer routines, and also before displaying a mouse pointer, playing FLI animations or MIDI music, and using any of the GUI routines.
RETURN VALUE
Returns zero on success, or a negative number on failure (but you may decide not to check the return value as this function is very unlikely to fail).