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Actually you don't have to write C code - you can use the C functions in RPG just like any other procedure. The redbook "Who Knew You Could Do That with RPG IV?" has examples of externalizing database access using these C functions - similar techniques apply to subfiles, which, after all, are just another format in a file. You'll need to get the additional materials for the redbook at a link at

http://www.redbooks.ibm.com/abstracts/sg245402.html?Open

There is a C function for READC and for all the other opcodes you normally use. You do have to set the format manually before calling the other functions, that's the main difference.

And this will be all RPGLE code - CALLP and EVAL with data structures and all.

HTH
Vern
-------------- Original message --------------
From: Bryce Martin <BMartin@xxxxxxxxxxxx>

Well I'm not really at liberty to be writing C code (as much as I would
love to) in my shop. That is not a language we support, so I guess I'll
just have to tough it out.
Panels...I think I'd rather not...



Thanks
Bryce Martin
Programmer/Analyst I
Ext. 4777



vhamberg@xxxxxxxxxxx
Sent by: rpg400-l-bounces@xxxxxxxxxxxx
07/26/2008 06:32 PM
Please respond to
RPG programming on the AS400 / iSeries


To
RPG programming on the AS400 / iSeries
cc

Subject
Re: Subfile as a procedure






Right - have used some of those functions in a previous life - thing is,
you can specify - in fact, you HAVE to specify - the format you want to
use, in a separate call, not in an F-spec, so its name can be passed as a
parameter to a generalized procedure. In RPG we are insulated from all
these gory details, but we do lose some power thereby.

Oh - one could also go with UIM panel group lists, too!

Just expanding on your info, Jon - heh!

HTH
Vern

-------------- Original message --------------
From: Jon Paris


On 25-Jul-08, at 11:24 PM, rpg400-l-request@xxxxxxxxxxxx wrote:

Just the other day I was thinking along these same lines. My
thought was
that if I could soft code the record format in a variable I could
move my
subfile setup to a sub procedure and just pass the record format in a
variable as the parameter that way I wouldn't have to write the same
subfile prep code over and over again for each one. Well as I found
out, ...

This can be done in RPG, but only by prototyping and wrappering the C
record I/O procedures. This is not that hard, but does require a
certain amount of knowledge of C. I thought that there were some
examples of doing this out on the web but I don't have time to search
for them right now.

An alternative option is the use the Dynamic Screen Manager (DSM) APIs
to handle the screens. This will not strictly speaking give you a
subfile but can be used for scrolling lists in windows etc. Again
there are examples out there.


Jon Paris

www.Partner400.com
www.SystemiDeveloper.com
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