+ wx__DECLARE_EVT1(wxEVT_TOOLBOOK_PAGE_CHANGING, winid, wxBookCtrlEventHandler(fn))
+
+// old wxEVT_COMMAND_* constants
+#define wxEVT_COMMAND_TOOLBOOK_PAGE_CHANGED wxEVT_TOOLBOOK_PAGE_CHANGED
+#define wxEVT_COMMAND_TOOLBOOK_PAGE_CHANGING wxEVT_TOOLBOOK_PAGE_CHANGING