waitfr(event_flag.i2.r [,status.i2.r])

	This routine will place the calling process in a wait state
	until the event specified by 'event_flag' is set. It will also
	optionally return the status of the event flag in 'status'.

	event_flag	event flag to wait for
	[status]	returned status value

	This function requires the following include files:


	Related functions:

	readef, setef, clref