stdafx_gui.h created, wx removed from stdafx.h

Utilities/StrFmt.cpp

@@ -14,7 +14,11 @@ std::string fmt::FormatV(const char *fmt, va_list args)
 	for (;;)
 	{
 		std::vector<char> buffptr(length);
+#if !defined(_MSC_VER)
 		size_t printlen = vsnprintf(buffptr.data(), length, fmt, args);
+#else
+		size_t printlen = vsnprintf_s(buffptr.data(), length, length - 1, fmt, args);
+#endif
 		if (printlen < length)
 		{
 			str = std::string(buffptr.data(), printlen);