Path: utzoo!utgpu!jarvis.csri.toronto.edu!rutgers!apple!bloom-beacon!bu-cs!dartvax!eleazar.dartmouth.edu!isle
From: isle@eleazar.dartmouth.edu (Ken Hancock)
Newsgroups: comp.sys.mac.programmer
Subject: Re: ResError Bug?
Message-ID: <14217@dartvax.Dartmouth.EDU>
Date: 5 Jul 89 18:56:53 GMT
References: <5914@hubcap.clemson.edu>
Sender: news@dartvax.Dartmouth.EDU
Reply-To: isle@eleazar.dartmouth.edu (Ken Hancock)
Organization: Personal Computing Center, Dartmouth College
Lines: 26

In article <5914@hubcap.clemson.edu> mikeoro@hubcap.clemson.edu (Michael K O'Rourke) writes:
>I am trying to read a PICT resource into my application.  I have a if-then
>statment which checks to see if the resource really existed, but it never 
>gets called in the error case.
>
>pict := PicHandle(Get1Resource('PICT',pictNumber));
>if ResError = noErr then
>    { do something}
>
>Well, i went in and found out that ResError ALWAYS returns noErr. What's up?

The correct check is:

if (pict <> NIL)  or for C tyes if (pict != NIL )

This, by the way, is in fact documented in inside mac in the
Resource Manager chapter.  If a GetResource call cannot find
the resource, it returns a NIL handle but does not generate
a resource mamager error.

Ken

Ken Hancock  '90                   | BITNET/UUCP/
Personal Computing Ctr Consultant  |   INTERNET:  isle@eleazar.dartmouth.edu
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