There seems to be a difference in results using FN HSETFILEINFO vs FN
SETFILEINFO.  Mainly in the file's type and creator signatures.  At the end
of a file duplicating program, I wrap things up with a FN SETFILEINFO
instruction and the duplicated file is created with correct signatures in
the finder.  But, if I substitute FN HSETFILEINFO instruction for the FN
SETFILEINFO instruction the file is created ok but has no signatures
recognized by the finder.

Note:  I took Rick Brown's advice and replaced GETFILEINFO instructions
with HGETFILEINFO instructions because it's newer.  Rick, however, didn't
mention the HSETFILEINFO instruction, though.  I just assumed....