DELPRC_EXIT can be used to control $DELPRC system service options
    that call exit handlers prior to final cleanup and deletion of a
    process. The following table describes these options:

    Option         Description

    0              Disable the exit handler functionality with
                   $DELPRC.

    4              Execute kernel mode exit handlers.

    5 (default)    Execute exec and more privileged mode exit
                   handlers.

    6              Execute supervisor and more privileged mode exit
                   handlers.

    7              Execute user and more privileged mode exit
                   handlers.

    DELPRC_EXIT is a DYNAMIC parameter.