+#ifdef __WXMSW__
+#define wxHelpController wxWinHelpController
+#define sm_classwxHelpController sm_classwxWinHelpController
+#elif defined(__WXGTK__)
+#define wxHelpController wxHTMLHelpController
+#define sm_classwxHelpController sm_classwxHTMLHelpController
+#else
+#define wxHelpController wxXLPHelpController
+#define sm_classwxHelpController sm_classwxXLPHelpController
+#endif
+