Example: MODCB macro (modify an exit list)

In this example, a MODCB macro is used to activate an exit in an exit list.

         MODCB EXLST=(*,        Indirect notation is used to specify   x
               EXLSTADR),       the address of the exit list generated x
         .     EODAD=(EOD,L,A)  at execution.
         .
EOD      DC    C'ENDUP'
EXLSTADR DS    F                When the exit list was generated,      x
                                its address was saved here.

The MODCB macro's parameters are:

EXLST specifies the address of the exit list being modified is located at EXLSTADR.
EODAD specifies the entry for the end-of-data routine is marked active in the exit list that has an address at EXLSTADR. The name of the end-of-data routine (ENDUP) is at EOD.