David Muir wrote in a message to Peter Fitzsimmons:

 DM>     Is there a way of which you're aware to determine if a
 DM> given drive is a  CD-ROM (without attempting to write to the
 DM> device since doing that to my old  WORM drive (which I
 DM> suspect a few others may still have as well) would give 
 DM> less than desirable results.
 DM>     For instance is the media byte distinctive for a CD-Rom
 DM> and if so, what  would it be and how would I read it?

Look at DosQueryFSAttach() and DosQueryFSInfo().  A CD-ROM will show a file
system name of CDFS.
 
-- Mike


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