Path: utzoo!utgpu!news-server.csri.toronto.edu!mailrus!cs.utexas.edu!uunet!mcsun!ukc!icdoc!qmw-cs!jeremyr
From: jeremyr@cs.qmw.ac.uk (Jeremy Roussak)
Newsgroups: comp.sys.mac.programmer
Subject: Re: Looking for Mac portable help
Message-ID: <1869@sequent.cs.qmw.ac.uk>
Date: 5 Apr 90 08:08:07 GMT
References: <9004031523.AA18805@jade.berkeley.edu>
Reply-To: jeremyr@cs.qmw.ac.uk (Jeremy Roussak)
Organization: Computer Science Dept, QMW, University of London, UK.
Lines: 18

In article <9004031523.AA18805@jade.berkeley.edu> lwv27@CAS.BITNET writes:
>A friend is having some trouble with some code he is testing.  Previously,
>the code was tested on SE, SE/30, Mac plus, etc.  When a menu with a grey
>item was selected, the program would catch a trap to some code which provided
>additional help.  But when the software runs on a Mac portable, the trap
>'doesn't seem to work or be in the toolbox' according to a msg I received
>this morning.

You don't need to patch a trap to do this.  According to IM V p240, the function 
MenuChoice will, if called after MenuSelect returns 0 in its high word,
return a longint with the menu of the disabled item in the high word
and the item number in the low word.  The global variable MenuDisable ($b54)
serves the same purpose.  If you're using a custom MDEF, however, this
may not work.

Hope this helps

Jeremy Roussak