typedef long off_t;
#endif
+#if defined(__VISAGECPP__) && __IBMCPP__ >= 400
+//
+// VisualAge C++ V4.0 cannot have any const decs
+// in headers included by more than one primary source
+//
+extern const off_t wxInvalidOffset;
+#else
const off_t wxInvalidOffset = (off_t)-1;
+#endif
enum wxSeekMode
{