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(3alleg4),                 set_display_switch_mode(3alleg4),
       exswitch(3alleg4)