Path: utzoo!attcan!uunet!clyde.concordia.ca!news-server.csri.toronto.edu!dgp.toronto.edu!tracyn
From: tracyn@dgp.toronto.edu (Tracy Narine)
Newsgroups: comp.sys.mac.programmer
Subject: VBL tasks Think C 4.0
Message-ID: <1990Jul3.123350.9958@jarvis.csri.toronto.edu>
Date: 3 Jul 90 16:33:50 GMT
Distribution: na
Organization: CSRI, University of Toronto
Lines: 12


I am writing an init that patches the JCrsrTask routine with my
own routine.  I am confused about Think's SetUpA4 macro and the
IM SetUpA5 macro.  They both seem to give me access to the globals
but I am unsure if I need to call both macros when I enter my 
VBL task, then call the corresponding RestoreA4,A5 when I leave
the task to access my globals.

What is the appropriate way of accessing global variables in a
VBL task routine that is encoded in an init? 

tracy