Path: utzoo!dptcdc!jarvis.csri.toronto.edu!mailrus!husc6!maymudes@husc4.UUCP
From: maymudes@husc4.UUCP (David Maymudes,,,4982298)
Newsgroups: comp.sys.mac.programmer
Subject: Re: NeedHelpWithNumfilter
Message-ID: <1650@husc6.harvard.edu>
Date: 18 Apr 89 17:40:52 GMT
References: <12863@swan.ulowell.edu>
Sender: news@husc6.harvard.edu
Reply-To: maymudes@husc4.UUCP
Lines: 36

From article <12863@swan.ulowell.edu>, by jkeegan@hawk.ulowell.edu (Jeff Keegan):
> 
> As of recently I have started to do my Mac programming using Lightspeed C
> (I formerly was using Lightspeed Pascal). In writing a program recently
> I have run into a problem that I can't seem to solve on my own.
> I want to create a dialog box (done), read it in and display it (done),
> and call ModalDialog with a function called "numFilter" as the filter
> procedure. I've managed to get it to work as far as running the filter
> routine every time.  [...]
> I've tripple checked the numfilter call.. It's something like
> 
>    Boolean numFilter (thediag,theevent,itemH)
>    DialogPtr thediag;
>    EventRecord *theevent;
>    Handle *itemH;
> 
Quite possibly, this should be declared as:

     pascal Boolean numFilter (thediag,theevent,itemH)
     ^^^^^^

LightSpeed C uses this convention to say that the function should use Pascal
calling conventions, required for any function called by the Toolbox.

I don't know what method other brands of Macintosh C use for this; the book
referred to in the original article may have been written with some other in
mind.
						--David Maymudes


						--David Maymudes

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