Control blocks

The control blocks associated with the user exit interface are illustrated in Figure 104 and listed below. Further information about the control blocks is given in the Design overview and in Figure 103.

Figure 104. Control blocks associated with the user exit interface
 This is a technical drawing showing the control blocks associated with the user exit interface.

The main control blocks are as follows:

UETH
User exit table header
UETE
User exit table entry--one for every exit point
EPB
Exit program block--one for every enabled user exit program, containing information about the location and activity of the program, and any global work area owned or shared by the program
EPL.
Exit program link--each EPL indicates one exit program to be invoked at an exit point and which EPL, if any, contains information about the next program to be invoked at that exit point.

See the CICS® Data Areas manual for a detailed description of these control blocks.

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