Newsgroups: comp.sys.mac.programmer
Path: utzoo!utgpu!watserv1!watmath!att!cbnewsk!ech
From: ech@cbnewsk.att.com (ned.horvath)
Subject: Re: Determine the foreground application
Organization: AT&T Bell Laboratories
Date: Thu, 18 Oct 90 03:15:28 GMT
Message-ID: <1990Oct18.031528.869@cbnewsk.att.com>
References: <25162@dartvax.Dartmouth.EDU>
Lines: 31

From article <25162@dartvax.Dartmouth.EDU>, by llama@eleazar.dartmouth.edu (Joe Francis):
> In article <5180@etsu.CMI.COM> dave@cmi.com (David Halonen) writes:
>>DrawMenuBar gets called as each app makes a major context switch.  Patch 
>>that sucker to keep track of who was on top before your app gets there and 
>>then do a OpenDeskApp on that name.  When DrawMenuBar is called, 
>>currAppName has the appropriate name filled in.  We've had great success 
>>with this.  Of course w/ System 7, a patch won't be necessary - I believe.
> 
> OK.  Let's say I'm a DrawMenuBar patch and I spy on curAppName.  What is the
> easist way for me to go from this to finding the current app CREATOR TYPE
> (or does the easiest way even use curAppName??).
> 
> -----------------------------------------------------------------------------
> "Read My Lips: No Nude Texans!" - George Bush clearing up a misunderstanding

"...watch me for the changes, and try to keep up."
	-- M. McFly

You want to start with CurApRefNum (short integer at $900).  Make a call to
PBGetFCBInfo (IM IV-179) with ioRefnum = CurApRefNum and ioFCBIndx = 0.
Be sure to provide a Str255 buffer in ioNamePtr.

Now call PBGetFInfo (IM IV-148) with the ioNamePtr and ioVRefNum you just
got, and ioFVersNum and ioFDirIndex set to 0.

At completion, examine the ioFlFndrInfo; its format is described on
IM IV-104.  The first two longwords are the type and creator.

Why is this kind of thing so hard...?

=Ned Horvath=