Re: Andy, please look at this code:

In lwlib/lwlib-Xlw.c:xlw_update_one_widget, we have #ifdef LWLIB_MENUBARS_LUCID else if (class == xlwMenuWidgetClass) { XlwMenuWidget mw; Arg al [1]; if (XtIsShell (widget)) mw = (XlwMenuWidget)((CompositeWidget)widget)->composite.children [0]; else mw = (XlwMenuWidget)widget; XtSetArg (al [0], XtNmenu, val); XtSetValues (widget, al, 1); } #endif Note how the code carefully creates a mw widget, and then ignores it. Perhaps the XtSetValues call should be XtSetValues (mw, al, 1);