frig_next_default_c (ul_friglib)

	status.i4.v = frig_next_default_c(,
					  [,direction.i4.v] [,file_index.i4.r]
	This routine selects the next (or previous) file relative to the file
	name given (wrap around is supported).
	file_name	file name used as base to determine next
			(or previous) file
	next_file_name	file name of next (or previous) file relative
			to passed file name
	[direction]	directional flag 
			(FRIG_NEXT_HOUSE -> return next house (default),
			 FRIG_PREVIOUS_HOUSE -> return previous house)
	[file_index]	return file index (currently has little meaning)
			(default is NULL)
	[file_type]	type of houses to choose from
			(FRIG_ALL_HOUSES -> all houses (default),
			 FRIG_FRIG_HOUSES -> normal refrigerator houses only,
			 FRIG_COMP_HOUSES -> compressor houses only)

	This function returns ACNET status values as follows:

	CBS_OK			success
	CBS_INVARG		invalid direction argument
	CBS_NO_SUCH		no matching house was found in menu tables
	CBS_MEMFAIL		unable to build tables

	This function requires the following include files:

	ul_friglib_h:friguti_h, acnet_errors_h

	Related functions:

	frig_default_menu_c, frig_verify_default_c, frig_next_user_file_c,