+#define wxUSE_THREADS 1
+ // support for multithreaded applications: if
+ // 1, compile in thread classes (thread.h)
+ // and make the library thread safe
+#define wxUSE_ZLIB 1
+ // Use zlib for compression in streams and PNG code
+#define wxUSE_LIBPNG 1
+ // Use PNG bitmap code
+#define wxUSE_STD_IOSTREAM 1
+ // Use standard C++ streams if 1. If 0, use wxWin
+ // streams implementation.
+