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From: dm@everexn.uucp (Dan McMullen)
Newsgroups: comp.sys.mac.programmer
Subject: Re: Inhibiting major switching under MultiFinder
Message-ID: <1990Jun12.155233.16847@everexn.uucp>
Date: 12 Jun 90 15:52:33 GMT
References: <1990Jun10.010643.5803@cs.UAlberta.CA>
Organization: Everex Systems, Inc.
Lines: 22

In <1990Jun10.010643.5803@cs.UAlberta.CA> news@cs.UAlberta.CA (News Administrator) writes:

>Is there a way I can get MultiFinder to suspend 
>major switching at this point without going back to a dBoxProc dialog,
>or putting image display support into my own program?

Currently, multifinder will refuse to do a major task switch if:

a. the varCode of the window is 1 (==dBoxProc), OR
b. the high bit of the spareFlag in the windowRecord is set.

this info from a recent query i made to macdts.  i got bit by this behavior
when a custom WDEF used varCode==1, and would refuse to do the task switch
like i expected, so that's one possible solution.  setting the bit in spareFlag
might work, but i haven't tried this.

any comments from Apple as to whether these solutions will continue to work
in the future?

-- 
dan mcmullen, everex systems, inc.                              (707) 823-0733
dm@everexn.uu.net                   ...!{well!fico2,pacbell!mslbrb}!everexn!dm