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From: davids@mondo.engin.umich.edu (David Snearline)
Newsgroups: comp.sys.mac.programmer
Subject: Re: Testing for System 7
Message-ID: <fck#ZlA@engin.umich.edu>
Date: 29 Jun 91 03:37:53 GMT
References: <1991Jun27.125511.19565@runx.oz.au> <54449@apple.Apple.COM>
Sender: davids@mondo.engin.umich.edu
Distribution: na
Organization: University of Michigan Engineering
Lines: 23

In article <54449@apple.Apple.COM> nerm@Apple.COM (Dean Yu) writes:
>In article <1991Jun27.125511.19565@runx.oz.au> mrd@runx.oz.au (Malcolm Davidson) writes:
>>How do I test for the presence of system 7? I dont have access to
>>IM VI as yet.
>>
>
>  Oh boy, oh boy, I get to use a party line.  You should never assume the 
>presence of a feature based on the version number of system software.  You 
>should check for the presence of each feature specifically by using the _Gestalt
>function.
>
>  -- Dean Yu
>     Blue Meanie, Negative Ethnic Role Model, Window Cleaner, etc.
>     Apple Computer, Inc.
>     blah blah blah blah...

Except that you would have to check the version of the system to see
if _Gestalt exists...  :-)

--
David Snearline
davids@mondo.engin.umich.edu
University of Michigan Engineering