+class WXDLLIMPEXP_FWD_CORE wxToolBarBase;
+class WXDLLIMPEXP_FWD_CORE wxCommandEvent;
+
+extern WXDLLIMPEXP_CORE const wxEventType wxEVT_COMMAND_TOOLBOOK_PAGE_CHANGED;
+extern WXDLLIMPEXP_CORE const wxEventType wxEVT_COMMAND_TOOLBOOK_PAGE_CHANGING;
+
+
+// Use wxButtonToolBar
+#define wxTBK_BUTTONBAR 0x0100
+
+// Use wxTB_HORZ_LAYOUT style for the controlling toolbar
+#define wxTBK_HORZ_LAYOUT 0x8000
+
+// deprecated synonym, don't use
+#if WXWIN_COMPATIBILITY_2_8
+ #define wxBK_BUTTONBAR wxTBK_BUTTONBAR
+#endif