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From: shap@sfsup.UUCP (J.S.Shapiro)
Newsgroups: comp.sys.mac
Subject: C problem
Message-ID: <2120@sfsup.UUCP>
Date: Mon, 28-Sep-87 02:35:39 EDT
Article-I.D.: sfsup.2120
Posted: Mon Sep 28 02:35:39 1987
Date-Received: Mon, 5-Oct-87 01:22:15 EDT
Organization: AT&T-IS, Summit N.J. USA
Lines: 17
Summary: Need help with screenBits from a DA

Now that we have different screen sizes, it no longer suffices to hardwire
things like the screen width. A DA is not really allowed to call InitGraf.
What can I do (assembler is ok) to find out the values of the screenBits
rect?

I have tried going indirect via register a5 to get at the host
application's quickdraw globals structure, and that doesn't seem to work.
This may be a MANX bug. If I simply say 'qd.screenBits', I get the
diagnostic:

Undefined symbol: _main

which, let me tell you, was a bitch to isolate.

How does one do this?

Jds aondimo