4. CA MICS Facilities › 4.3 User Exit Facilities

4.3 User Exit Facilities

Modifying existing code directly is certainly a way to change
any software product.  There may be situations in CA MICS
that warrant such code modification.  However, the large
majority of extended CA MICS system tailoring can be done
through the CA MICS User Exit Facilities.

There have been a large number of user exit points defined
within CA MICS. Each of these points corresponds to a
position in the CA MICS logic where user modification:

    - is likely to occur, based on our experience.

    - presents a low level of possibility to compromise
      CA MICS database and operational integrity.

    - is relatively easy to document and understand.

Using the CA MICS exit facilities to modify CA MICS logic is
the safest method of system modification.  Following the
material in this chapter will allow you to get a substantial
amount of optional system customization done and will cause
almost no extraordinary considerations for the application of
standard vendor maintenance to the product.