Is there a method of converting short filenames, as returned to DOS programs by W9x back to the original long filename.

I need to do a search on a set of textfiles, using an old DOS program, which returns a list of filenames matching a particular set of criteria & then match these short filenames to the full length filename stored as a field in a database table.

I guess there should be a function or API call, but I cant find it in the documentation.

TIA
Paul