INT 2F U - NETWORK REDIRECTOR - FINDNEXT
        AX = 111Ch
        SS = DS = DOS DS
        [DTA] = 21-byte findfirst search data (see INT 21/AH=4Eh)
Return: CF set on error
            AX = DOS error code (see INT 21/AH=59h)
        CF clear if successful
            [DTA] = updated findfirst search data
                    (bit 7 of first byte must be set)
            [DTA+15h] = standard directory entry for file
Note:   called by DOS 3.1+ kernel
SeeAlso: INT 21/AH=4Fh