Try reading this post - I got all my knowledge from there - persevere until you get to the bit about decoding this field using bitand operator:
https://bobj-board.org/t/16976
beckster 
(BOB member since 2003-02-18)
Try reading this post - I got all my knowledge from there - persevere until you get to the bit about decoding this field using bitand operator:
https://bobj-board.org/t/16976
beckster (BOB member since 2003-02-18)