public void Initialize()
{
//make a tree that only contains nodes that have a window
//mark nodes with hidden windows as inactive
if (FNodeView != null)
FNodeView.Dispose();
FNodeView = FNodeFilter.UpdateFilter("< w t ", FHDEHost.RootNode);
FNodeView.SetActiveWindow(FActiveWindow);
//mark the incoming window as selected
FHierarchyViewer.Input = FNodeView;
//always on open the second window from the LIFO is selected
FSelectedWindowIndex = 0;
}