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From: mxmora@unix.SRI.COM (Matt Mora)
Newsgroups: comp.sys.mac.programmer
Subject: Volume Questions
Message-ID: <17533@unix.SRI.COM>
Date: 23 Oct 90 23:18:57 GMT
Reply-To: mxmora@sri-unix.sri.com (Matt Mora)
Organization: SRI International, Menlo Park, CA
Lines: 41
Keywords:Drive,Volumes,Devices


I have a few questions about getting information from 
mounted volumes.

1. How do you tell if the media is removable? I know this has 
   been hashed over before but I could only find some C code from
   Brian Bechel (sp?). Does anybody have code to do this in Pascal?

2. This is related to question 1, what is the difference between 
   PBUnmountVol(pb) and PBEject(pb)? Can I just call PBUnmountVol and
   will it eject a floppy? What about the reverse, am I wrong to assume that
   eject will also unmount a volume? 

3. I can't seem to find some sample code that shows how to get the icon from 
   a volume. Does anybody have some code to share?


What I'm doing:
I have a dialog box that the user can select a volume. It has four buttons
named, Select,Cancel,Eject,Drive. It also displays the name of the current
volume in a static text field. I would also like to display the current 
volume's icon. 

Should the button named "eject" change its name when the next volume selected
is not ejectable to unmout or should it just be dimmed?

Thanks for any insight you can provide.

P.S. IM talks about get the drive's icon by doing a PBcontrol call. I tried
that but THINK Pascal won't let me coerse the return value in to a handle.

Boy, I really should learn C :-)




-- 
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Matthew Mora                |   my Mac  Matt_Mora@sri.com
SRI International           |  my unix  mxmora@unix.sri.com
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