debian man page for is_windowed_mode

is_windowed_mode(3alleg4)					  Allegro manual					 is_windowed_mode(3alleg4)

NAME
       is_windowed_mode - Tells if you are running in windowed mode. Allegro game programming library.

SYNOPSIS
       #include <allegro.h>

       int is_windowed_mode(void);

DESCRIPTION
       This function can be used to detect whether or not set_gfx_mode() selected a windowed mode. Example:

	  if (set_gfx_mode(GFX_AUTODETECT, 640, 480, 0, 0) != 0)
	     abort_on_error("Couldn't set graphic mode!");
	  if (is_windowed_mode()) {
	     /* Windowed mode stuff. */
	  } else {
	     /* Fullscreen mode stuff. */
	  }

RETURN VALUE
       Returns	true if the current graphics mode is a windowed mode, or zero if it is a fullscreen mode. You should not call this function if you
       are not in graphics mode.

SEE ALSO
       set_gfx_mode(3alleg4)

Allegro 							   version 4.4.2					 is_windowed_mode(3alleg4)