NAME
    ParentOfFH -- returns a lock on the parent directory of a file (V36)
SYNOPSIS
    lock = ParentOfFH(fh)
    D0               D1
    BPTR ParentOfFH(BPTR)
FUNCTION
    Returns a shared lock on the parent directory of the filehandle.
INPUTS
    fh   - Filehandle you want the parent of.
RESULT
    lock - Lock on parent directory of the filehandle or NULL for failure.
SEE ALSO
    Parent(), lock(), unlock() duplockfromfh()