gtpi1m2pSystem Installation Support Reference

ECB-Controlled Program User Exits Overview

User exits allow you to add user-unique processing at various points in TPF programs without having to modify the released programs. ECB-controlled program user exits are called by ECB-controlled program exit points that reside in ECB-controlled programs.

Note:
Because ECB-controlled program exit points that are provided are in function programs, no performance impact on the system is anticipated. However, have detailed knowledge of TPF system internals before activating or writing user exit code.