-{\it Note:} if not all characters are being intercepted by your OnKeyDown or OnChar handler,
-it may be because you are using the wxTAB\_TRAVERSAL style, which grabs some keypresses for use
-by child controls.
+{\it Note:} Tab traversal is implemented through an otherwise undocumented
+intermediate wxControlContainer class from which any class can derive
+in addition to the normal wxWindow base class. Please see <wx/containr.h>
+and <wx/panel.h> to find out how this is achieved.
+
+{\it Note:} if not all characters are being intercepted by your OnKeyDown or
+OnChar handler, it may be because you are using the wxTAB\_TRAVERSAL style,
+which grabs some keypresses for use by child controls.