CICS customization
IBM CICS provides the following interfaces to allow you to access CICS control blocks, enhance or modify CICS, and customize the product for special needs and functions:
System generation
Initialization and termination processing
User exits
User-replaceable modules
System programmer interfaces
Source and object compatibility is not always ensured for most of these interfaces when you migrate from one CICS release to another. You might have to recompile and rework the logic that you implemented.
If you have programs that ...

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