Charles Mills wrote:

> You can write code that Rexx will call for all I/O including Say. See
> Chapter 14 of the TSO Rexx reference. I have done this sort of thing; it
is
> not for the faint-hearted. 

I've done it too, and indeed it's not for the faint-hearted. The
documentation leaves much to the experimenter. But the biggest problem is
that it is not supported if the Rexx environment is "integrated into TSO/E",
which applies to pretty much all Rexx environments that anyone is using
while sitting at a TSO screen. Yes, you can invoke Rexx from a program under
TSO and explicitly not have it "integrated", but then you lose all sorts of
expected functionality, such as TSO commands, EXECIO, and a number of common
built-in functions.

> I am *guessing* that Rexx would call it for TRACE I/O. 

Yes, it does, and it works fine in a non-TSO/E environment. 

> You can also read and write Rexx variables from outside Rexx using
IRXEXCOM.

That, at least, does work in an "integrated" environment.

Tony H.

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