Is there a way to change the background, foreground, etc. of an XmManager and all of its children without generating multiple Expose events? In other words, can I traverse the Widget tree starting from the XmManager and call XClearArea (or a similar function) in the end? Does each individual Widget window need an Expose or would exposing the containing window redraw them all? I know that using XtSetValues can cause multiple Expose events. Would it be better to call the Core and Constraint set_values functions myself and Expose once in the end or is this considered too dangerous? Thanks.