From:	CSBVAX::MRGATE!info-vax-RELAY@KL.SRI.COM@SMTP 19-JUN-1988 05:35
To:	ARISIA::EVERHART
Subj:	CTL$GB_MSGMASK Process Message Mask (was CLI$DCL_PARSE...)


Received: from mitre-bedford.ARPA by KL.SRI.COM with TCP; Wed, 15 Jun 88 06:02:34 PDT
Full-Name: Granoff
Message-Id: <8806151302.AA18495@mitre-bedford.ARPA>
Posted-From: The MITRE Corp., Bedford, MA
To: info-vax@kl.sri.com
Organization: The MITRE Corporation, Bedford, Mass.
Phone: (617) 271-7506
Subject: CTL$GB_MSGMASK Process Message Mask (was CLI$DCL_PARSE...)
Date: Wed, 15 Jun 88 09:02:27 EDT
From: Mark H. Granoff <mhg@mitre-bedford.ARPA>

Recently I posted a message about surpressing the error output from
CLI$DCL_PARSE.  I mentioned that if a SET MESS/NOFAC/NO... command is
issued before running the program, the error output does not display.

I did get a response from Mike Marques; he suggested using
LIB$ESTABLISH to set up a condition handler that does nothing.  A good
idea in theory, but the manual recommends not using this service in
high level languages (like BASIC) that already have condition handlers
set up.  I am using BASIC (stop laughing), and being curious, I tried
it out.  My results were something less than successful.  A condition
handler is overkill for my application anyway.

I did a little poking around in my "new and improved" Version 4.4
VAX/VMS Internals book ($75 from DEC, order #EY-8264E-DP) and found a
symbol for the process message mask.  The symbol, CTL$GB_MSGMASK, is a
byte and definately is affected if a SET MESSAGE command is issued.
So, I have two questions:

     1. Which bits in this byte represent which MESSAGE parts (i.e.
     facility, severity, ident, text).

     2. How can I easily access/modify this mask.  Code examples are
     always welcome, even MACRO-32. :-)  Any other relevant tidbits of
     information on this topic are also welcome.

Thanks in advance for any help.

+--------------------------------------------------------------------+
| Mark H. Granoff                      Member of the Technical Staff |
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