(I64 only.) The Get Current Invocation Context routine gets the
    invocation context of a current procedure.

    Format

      LIB$I64_GET_CURR_INVO_CONTEXT   invo_context

1  –  Returns

    OpenVMS usage:cond_value
    type:         longword (unsigned)
    access:       write only
    mechanism:    by value

2  –  Argument

 invo_context

    OpenVMS usage:invo_context_blk
    type:         structure
    access:       modify only
    mechanism:    by reference

    Address of an invocation context block into which the procedure
    context of the caller will be written.