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 the longword that
    contains the index.

 txtrfa

    OpenVMS usage:vector_longword_unsigned
    type:         longword (unsigned)
    access:       read only
    mechanism:    by reference
    Record's file address (RFA) of the module header for the module
    you want to delete. The txtrfa argument is the address of the 2-
    longword array that contains the RFA. You can obtain the RFA of a
    module header by calling LBR$LOOKUP_KEY or LBR$PUT_RECORD.

 flags

    OpenVMS usage:mask_longword
    type:         longword (unsigned)
    access:       read only
    mechanism:    by value
    The contents of the flag are ignored. The purpose of this
    argument is to indicate to this routine that the application
    knows about the new index structure for ELF object and ELF
    shareable image libraries.