+\twocolitem{\windowstyle{wxDIALOG\_EX\_CONTEXTHELP}}{Under Windows, puts a query button on the
+caption. When pressed, Windows will go into a context-sensitive help mode and wxWindows will send
+a wxEVT\_HELP event if the user clicked on an application window. {\it Note} that this is an extended
+style and must be set by calling \helpref{SetExtraStyle}{wxwindowsetextrastyle} before Create is called (two-step construction).}