Library /sys$common/syshlp/helplib.hlb

 invo_context

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

    Address of a valid invocation context block.

 pc_copy

    OpenVMS usage:PC value
    type:         quadword
    access:       read
    mechanism:    by reference

    Address of a quadword that contains the PC value to be written to
    the invocation context block.