INT 21 - DOS 2+ - "FINDNEXT" - FIND NEXT MATCHING FILE
        AH = 4Fh
        [DTA] = data block from previous FindFirst or FindNext call
Return: CF clear if successful
        CF set on error
            AX = error code (12h) (see AH=59h)
Note:   under Novell DOS 7, if the FindFirst call (AH=4Eh) had CX=0088h, then
          the next matching deleted file will be returned
BUG:    DR-DOS 3.41 and 5.0 return the Directory attribute for the volume label
SeeAlso: AH=12h,AH=4Eh

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