+#ifdef __WXMSW__
+#define wxHelpController wxWinHelpController
+#define classwxHelpController classwxWinHelpController
+#elif defined(__WXGTK__)
+#define wxHelpController wxHTMLHelpController
+#define classwxHelpController classwxHTMLHelpController
+#else
+#define wxHelpController wxXLPHelpController
+#define classwxHelpController classwxXLPHelpController
+#endif
+