NAME
    GfxLookUp -- find a graphics extended node associated with a
                 given pointer (V36)

SYNOPSIS
    result = GfxLookUp( pointer );
      d0                   a0

    struct extendednode *gfxlookup( void *);

FUNCTION
    Finds a special graphics extended data structure (if any) associated
    with the pointer to a data structure (eg: viewextra associated with
    a view structure).

INPUTS
    pointer = a pointer to a data structure which may have an
              extendednode associated with it (typically a view ).

RESULT
    result = a pointer to the extendednode that has previously been
             associated with the pointer.

BUGS

SEE ALSO
    graphics/gfxnodes.h gfxnew() gfxfree() gfxassociate()