Path: utzoo!utgpu!jarvis.csri.toronto.edu!rutgers!apple!bloom-beacon!husc6!lloyd!kent
From: kent@lloyd.camex.uucp (Kent Borg)
Newsgroups: comp.sys.mac.programmer
Subject: Standard File Hacking
Message-ID: <421@lloyd.camex.uucp>
Date: 15 Jun 89 21:30:18 GMT
References: <819@tekno.chalmers.se> <419@lloyd.camex.uucp>
Reply-To: kent@lloyd.UUCP (Kent Borg)
Organization: Camex, Inc., Boston, Mass USA
Lines: 22

In article <419@lloyd.camex.uucp> I write:
>About *my* recent question of how to find out the directory of the
>currently selected file in SFGetFile at hook time.  Yes, -1 *
>SFSaveDisk is the volume and CirDirStore is the dirID.  That works.
>What I don't know is a good way to get from there to opening the
>currently selected file with OpenResFile.

I figured it out.  Turns out to be easy.  PBHSetVol was the answer.
Call GetVol and remember the result, stuff a WDPBRec parameter block,
call PBHSetVol, call OpenResFile, call SetVol to restore the
remembered value (see Tech Note 140).

Other than a random set of illegal instruction bombs, it works.  (Must
dig about looking for uninitialized thingies.)  I never did figure out
why my sequence of calls to SetVol didn't do it--I don't really know
what SetVol is supposed to do and Inside Macintosh is very terse on
the subject--but I do know a lot more about HFS now.

Kent Borg
kent@lloyd.uucp
or
...!husc6!lloyd!kent