VMS Help RTL Routines, SMG$, SMG$DELETE_KEY_DEF, Arguments  *Conan The Librarian (sorry for the slow response - running on an old VAX)

 key-table-id

    OpenVMS usage:identifier
    type:         longword (unsigned)
    access:       read only
    mechanism:    by reference

    Identifies the key table from which the key definition is
    deleted. The key-table-id argument is the address of an unsigned
    longword that contains the key table identifier.

 key-name

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

    String containing the name of the key whose definition is to be
    deleted. The key-name argument is the address of a descriptor
    pointing to the key name. The key name is stripped of trailing
    blanks and converted to uppercase before use.

 if-state

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

    String containing a state name that further qualifies key-name.
    The if-state argument is the address of a descriptor pointing to
    the state name. If omitted, the null state is used. Thus if a key
    has several definitions depending on various values of if-state,
    this routine lets you delete only one of those definitions.