Using this user exit, you can indicate a change of the active logical screen. Together with the logical screen start and end user exits, it allows resource use to be monitored for each ISPF logical screen.

ISPF calls the exit routines at this user exit just after the logical screen to be given control is activated. In addition, ISPF calls the exit routines if the SPLIT command is entered when the screen is already split.

Exit parameters

This user exit uses only the standard exit parameters described in Exit parameter list, which includes the logical screen identifier (screenid). The screen ID identifies the logical screen activated as a result of the SWAP command.

Return codes