NAME 
        HelpControl -- Enable/disable Gadget-Help feature. (V39)

    SYNOPSIS 
        HelpControl( window, flags )
                     A0      D0

        VOID HelpControl( struct window *, ulong );

    FUNCTION 
        This function can be used to turn Gadget-Help on or off for
        your window.  Gadget-Help will also be enabled/disabled
        accordingly for all other windows which share the same
        help-group.  This allows Gadget-Help to be well-behaved
        for multiple-window applications.

    INPUTS 
        window - Pointer to the window you wish to affect.  (Other windows
            will also be affected, as explained above.
        flags - Currently, HC_GADGETHELP or zero are the allowed values.

    RESULT 
        One or more windows will have Gadget-Help turned on or off.

    NOTES
        You must use utility.library/getuniqueid() to get a help-group
        identifier.  Never ever supply your own!

    SEE ALSO 
        WA_HelpGroup