/sys$common/syshlp/helplib.hlb LBR Routines, LBR$DELETE_KEY, Arguments  *Conan The Librarian (sorry for the slow response - running on an old VAX)

 library_index

    OpenVMS usage:longword_unsigned
    type:         longword (unsigned)
    access:       read only
    mechanism:    by reference
    Library control index returned by the LBR$INI_CONTROL routine.
    The library_index argument is the address of a longword
    containing the index.

 key_name

    OpenVMS usage:longword_unsigned
    type:         longword (unsigned)
    access:       read only
    mechanism:    by reference
    Key to be deleted from the library index. For libraries with
    binary keys, the key_name argument is the address of an unsigned
    longword containing the key number.

    For libraries with ASCII keys, the key_name argument is the
    address of the string descriptor pointing to the key with the
    following argument characteristics:

    Argument
    Characteristics Entry

    OpenVMS usage   char_string
    type            character string
    access          read only
    mechanism       by descriptor