Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!cs.utexas.edu!usc!snorkelwacker!bloom-beacon!SUMEX-AIM.STANFORD.EDU!sayuri
From: sayuri@SUMEX-AIM.STANFORD.EDU (Sayuri Nishimura)
Newsgroups: comp.windows.x
Subject: Re: drawing with xor
Message-ID: <CMM.0.88.629797021.sayuri@sumex-aim.stanford.edu>
Date: 16 Dec 89 07:37:01 GMT
Sender: daemon@athena.mit.edu (Mr Background)
Organization: The Internet
Lines: 3

I figured out how I was misunderstanding the xor problem.
Thus, please do not worry about my original question. Thanks.
sayuri