Library /sys$common/syshlp/helplib.hlb  —  RTL Routines, LIB$  LIB$I64_GET_PREV_INVO_CONTEXT
    (I64 only.) The Get Current Invocation Context routine obtains
    the invocation context of the procedure context preceding any
    other procedure context.

    Format

      LIB$I64_GET_PREV_INVO_CONTEXT   invo_context
Additional Information: explode extract
Returns Argument
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