set_mouse_sprite_focus (3) - Linux Man Pages
set_mouse_sprite_focus: Sets the mouse sprite focus. Allegro game programming library.
set_mouse_sprite_focus - Sets the mouse sprite focus. Allegro game programming library.
void set_mouse_sprite_focus(int x, int y);
The mouse focus is the bit of the pointer that represents the actual
mouse position, ie. the (mouse_x, mouse_y) position. By default this is
the top left corner of the arrow, but if you are using a different mouse
pointer you might need to alter it.