SOME TYPICAL VALUES FOR THE "HOW OPEN CODE" (HOC) ARE AS FOLLOWS:
 
 
HOC = 416	FILE IS ACCESSED FOR WRITE
		FILE IS ACCESSED FOR EXTENDING
		A NEW FILE WILL BE CREATED
		
		FILE WILL BE ACCESSED USING DIRECT ACCESS
		(RANDOM) BLOCK I/O.
HOC = 401	FILE IS ACCESSED FOR READ ONLY

		FILE WILL BE ACCESSED USING DIRECT ACCESS
		(RANDOM) BLOCK I/O.
HOC = 516	FILE IS ACCESSED FOR WRITE
		FILE IS ACCESSED FOR EXTENDING
		IF THE FILE EXISTS IT WILL BE SUPERSEEDED
		(OVERWRITTEN), IF THE FILE DOES NOT
		EXIST IT WILL BE CREATED.
		FILE WILL BE ACCESSED USING DIRECT ACCESS
		(RANDOM) BLOCK I/O.
HOC = 441	FILE IS ACCESSED FOR READ ONLY
		FILE IS OPENED FOR SHARED ACCESS

RECORD I/O

HOC = 1016	FILE IS ACCESSED FOR WRITE
		FILE IS ACCESSED FOR EXTENDING
		A NEW FILE WILL BE CREATED

		FILE WILL BE ACCESSED USING RANDOM 

		ACCESS OF FIXED LENGTH RECORDS.  BUFFERING
		OF THE RECORDS WILL TAKE PLACE.