> -----Original Message-----
> From: IBM Mainframe Discussion List On Behalf Of John Gilmore
>
> My choice of the phrase "behind the scenes" was perhaps less than felicitous.
> By it I meant to say
> that while many/most programmers understand that return codes may, very often
> will be, set by a CALL
> statement or a function reference, they are often not so clear about what
> happens when an EXEC
> <whatever> statement is executed.
>
> A CICS AP may do neither, either, or both. An executed CICS [Command
> Level, to use some old
> terminology] service returning control to an AP uses the COMMAREA.
ITYM "EXEC Interface Block" (DFHEIBLK). The COMMAREA is (optionally) used by
application programs to communicate among themselves. CICS itself
"communicates" with application programs via the DFHEIBLK.
-jc-
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