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From: carolyn@cbmvax.cbm.UUCP (Carolyn Scheppner CATS)
Newsgroups: comp.sys.amiga
Subject: Re: Intuition Extensions & other languages
Message-ID: <1776@cbmvax.cbmvax.cbm.UUCP>
Date: Mon, 27-Apr-87 18:47:53 EDT
Article-I.D.: cbmvax.1776
Posted: Mon Apr 27 18:47:53 1987
Date-Received: Wed, 29-Apr-87 02:31:50 EDT
References: <3604@garfield.UUCP>
Reply-To: carolyn@cbmvax.UUCP (Carolyn Scheppner CATS)
Organization: Commodore Technology, West Chester, PA
Lines: 24

In article <3604@garfield.UUCP> john13@garfield.UUCP writes:
>[]
>
>I don't know if there are programs now which use the UserData fields. I
>suspect I'll soon be checking out a lot of commercial software to see if it
>actually does. Even in a worst-case situation for a window not using the
>UserData area, all you would end up with would be some memory not de-allocated
>properly, and as I said earlier a patch program could take care of that for
>older software.
>
>Well, what does everyone think?

   There's one important program that uses the UserData field: WorkBench

   From looking at the source, it appears to use the UserData field as
a pointer to a Damage list that it maintains.  And anything you put
there will probably be wiped out and may cause other unknown things
to get trashed.
-- 
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Carolyn Scheppner -- CBM   >>Amiga Technical Support<<
                     UUCP  ...{allegra,caip,ihnp4,seismo}!cbmvax!carolyn 
                     PHONE 215-431-9180
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