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From: lsr@apple.UUCP (Larry Rosenstein)
Newsgroups: comp.sys.mac
Subject: Re: Making sure PrGeneral exists
Message-ID: <6618@apple.UUCP>
Date: Wed, 4-Nov-87 12:29:54 EST
Article-I.D.: apple.6618
Posted: Wed Nov  4 12:29:54 1987
Date-Received: Sat, 7-Nov-87 10:27:24 EST
References: <12346681477.300.P.PRIAPUS@HAMLET.STANFORD.EDU> <7532@dartvax.UUCP>
Reply-To: lsr@apple.UUCP (Larry Rosenstein)
Organization: Advanced Technology Group, Apple Computer
Lines: 24

In article <7532@dartvax.UUCP> earleh@dartvax.UUCP (Earle R. Horton) writes:
>
>let the development system library routine find out if it exists.  Either
>PrError() or ResError() will return resNotFound if the resource does not
>exist.

According to Inside Mac volume 5, you should call PrError.  I wouldn't
assume that ResError will have the same error.

>It's important to realize that the Printing Manager calls are not traps, but

Actually, starting with System 4.1, there is a Print Manager trap, which
replaces the glue that used to be linked with every application.  (The trap
is in the Mac SE and Mac II ROMs.)  You are right, however, in that the trap
ultimately calls code in the printer driver resource file.

-- 
Larry Rosenstein

Object Specialist
Apple Computer

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