Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!uunet!tcs!tcs.com!pbuck
From: pbuck@tcs.com (Peter Buckner)
Newsgroups: comp.sys.mac.programmer
Subject: Re: Problem: getting strucRgn/contRgn of invisible windows
Message-ID: <1656@tcs.tcs.com>
Date: 29 Jan 91 18:33:18 GMT
Sender: root@tcs.com
Organization: Teknekron Communications Systems
Lines: 21
References:<48582@apple.Apple.COM> <3856@uakari.primate.wisc.edu>

In article <3856@uakari.primate.wisc.edu> bin@primate.wisc.edu (Brain in 
Neutral) writes:
> | MacApp does this by saving off the contents of those fields, calling
> | the WDEF directly with the wCalcRgns message, looking at the results,
> | and then restoring the old contents of the fields.
> 
> Anyone have code to do this?  (Yes, I feel stupid asking this, since
> the WDEF function definition is in IM, but I had already tried this
> and couldn't get it to work.  THINK C preferred, but anythink accepted
> gratefully.)

Hmm... If I remember right, to call an existing WDEF function, do 
something like this:

   WindowPeek wnd;
   int varCode = L;
   long param = 0L;
   int message = wCalcRgns;
   ret = CallPascalL(varCode, wnd, message, param,wnd->windowDefProc);

That should update theWindow->strucRgn & theWindow->contRgn fields.