...
Notes
To write a segment a valid filename must be placed in the buffer pointed to by DE and the replacement segment is point to by HL. If the new segment is an extension then the first three characters are used.
Bugs
Unreliable with small filenames.
Related calls
GN_Fcm, compress a filename
GN_Fex, expand a filename
GN_Opw, Open wildcard handler
GN_Pfs, parse filename segment
GN_Prs, parse filename
GN_Wcl, close wildcard handle
GN_Wfn, fetch next match for wildcard string (handle)
GN_Wsm, match filename segment to wildcard string