IBM SC33-1683-02 - Manual (Page 178)

6. Set the X'02' existence bit on in IC_BITS1 to indicate that a SYSID is
specified.
7. Return to CICS.
In XICEREQC:
1. Scan the global work area (GWA) and locate the entry for the CICS
region specified in the SYSID parameter.
2. Decrement the use count for this system.
3. If a GETMAIN was issued in XICEREQ to obtain an area to hold the
SYSID, issue a FREEMAIN for the address held in UEPICTOK.
4. Return to CICS.
Example and sample programs
CICS supplies two programs for use at the XICEREQ exit:
v DFH$XTSE, supplied in hardcopy only, is an example program that shows
how to modify fields in the command-level parameter structure passed to all
the EXEC interface exits. DFH$XTSE is listed on page 807.
v DFH$ICCN is a sample program for use in a distributed routing
environment, where you want to cancel a previously-issued interval control
request but have no way of knowing to which region to direct the CANCEL.
For examples of situations which DFH$ICCN is designed to cope with, see
the
CICS Intercommunication Guide.
interval control EXEC interface program exits
146 CICS TS for OS/390: CICS Customization Guide
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