freeze_mouse_flag - Flag to avoid redrawing the mouse pointer. Allegro
game programming library.
#include <allegro.h>
extern volatile int freeze_mouse_flag;
If this flag is set, the mouse pointer won't be redrawn when the mouse
moves. This can avoid the need to hide the pointer every time you draw
to the screen, as long as you make sure your drawing doesn't overlap
with the current pointer position.
show_mouse(3alleg)