The address of the invoke flags is passed to the exit routine in the USERVAR exit parameter list. The invoke flags indicate the reason VTAM® is calling the USERVAR exit for invoke processing. The invoke flags also determine which parameters VTAM will pass to the exit. The flags are:

X'01'

Request for USERVAR to be added

X'02'

Request for USERVAR to be updated

X'04'

Request for USERVAR to be translated

X'08'

Request for USERVAR to be deleted