\twocolitem{{\bf EVT\_TREE\_END\_DRAG(id, func)}}{The user has released the mouse after dragging an item.}
\twocolitem{{\bf EVT\_TREE\_END\_LABEL\_EDIT(id, func)}}{The user has finished editing a label. This can be prevented by calling \helpref{Veto()}{wxnotifyeventveto}.}
\twocolitem{{\bf EVT\_TREE\_DELETE\_ITEM(id, func)}}{A tree item has been deleted.}
-% thy're not very (or at all) useful currently
+% they're not very (or at all) useful currently
%\twocolitem{{\bf EVT\_TREE\_GET\_INFO(id, func)}}{Request information from the application.}
%\twocolitem{{\bf EVT\_TREE\_SET\_INFO(id, func)}}{Information is being supplied.}
\twocolitem{{\bf EVT\_TREE\_ITEM\_ACTIVATED(id, func)}}{An item has been activated (e.g. double clicked).}