Introduction to Developing Exit Points

A user exit is a point in MSS itself at which control can be transferred to a user-written program and at which MSS can resume control after it has finished. The following types of user exit program are supported:

• Global exit programs. A global user exit is a point in the code that is unrelated to any particular CICS task; for example before control is transferred to an application program. The following types of global user exits are supported:
  • XZCATT
  • XZCIN
  • XZCOUT
  • XEIIN
  • XEIOUT
  • XWBOPEN
  • XWBSNDO
  • XWBAUTH
• Task-related exit programs. A task-related user exit is a point in the code that handles task-related functions such as rollbacks and commits.
• Security exit programs. A security exit program is an exit program written to emulate the behavior of the QUERY SECURITY CICS command.

You must write separate global and task-related user exits. You must write all user exit programs in non-mainframe COBOL. They must not use EXEC CICS commands, and they must use native addressing for pointers.