+ /**
+ Sets whether the help frame should prevent application from exiting
+ if it's the only remaining top level window.
+
+ @enable
+ If @true, the application will not quit unless the help frame is
+ closed. Default is @false, i.e. the application does exit if only
+ the help window remains opened.
+
+ @see wxApp::SetExitOnFrameDelete()
+
+ @since 2.9.2
+ */
+ void SetShouldPreventAppExit(bool enable);
+