-position is in the process of being changed. May be used to modify the
-position of the tracking bar to properly reflect the position that
-would be set if the drag were to be completed at this point. Processes
-a wxEVT\_COMMAND\_SPLITTER\_SASH\_POS\_CHANGING event.}
+position is in the process of being changed. You may prevent this change
+from happening by calling \helpref{Veto}{wxnotifyeventveto} or you may also
+modify the position of the tracking bar to properly reflect the position that
+would be set if the drag were to be completed at this point. Processes a
+wxEVT\_COMMAND\_SPLITTER\_SASH\_POS\_CHANGING event.}