Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!cs.utexas.edu!samsung!sol.ctr.columbia.edu!emory!hubcap!mikeoro
From: mikeoro@hubcap.clemson.edu (Michael K O'Rourke)
Newsgroups: comp.sys.mac.programmer
Subject: HLock
Message-ID: <7472@hubcap.clemson.edu>
Date: 16 Dec 89 05:06:11 GMT
Organization: Clemson University, Clemson, SC
Lines: 15

I know this has been discussed before, but could someone tell me when
it is necessary to use HLock?  If i have a handle within a CDEF do i need
to do so?  What if i only access the handle thru a pointer, i.e. :

void doSomething(theControl)
ControlHandle theControl;
{
ControlPtr cp;

cp = *theControl;
if (cp->contrlRect ...... and so on.......


Thanks,
Michael