set_display_switch_callback(3)  Allegro manual  set_display_switch_callback(3)



NAME
       set_display_switch_callback - Installs a switching notification
       callback. Allegro game programming library.

SYNOPSIS
       #include <allegro.h>


       int set_display_switch_callback(int dir, void (*cb)());

DESCRIPTION
       Installs a notification callback for the switching mode that was
       previously selected by calling set_display_switch_mode(). The direction
       parameter can either be SWITCH_IN or SWITCH_OUT, depending whether you
       want to be notified about switches away from your program or back to
       your program. You can sometimes install callbacks for both directions
       at the same time, but not every platform supports this. You can install
       several switch callbacks, but no more than eight on any platform.

RETURN VALUE
       Returns zero on success, decreasing the number of empty callback slots
       by one. Returns -1 if the request is impossible for the current
       platform or you have reached the maximum number of allowed callbacks.


SEE ALSO
       remove_display_switch_callback(3), set_display_switch_mode(3),
       exswitch(3)



Allegro                          version 4.2.3  set_display_switch_callback(3)
