WinRT dll should also use __declspec to build.
@@ -34,7 +34,7 @@
# define BGFX_SHARED_LIB_USE 0
#endif // BGFX_SHARED_LIB_USE
-#if BX_PLATFORM_WINDOWS
+#if BX_PLATFORM_WINDOWS||BX_PLATFORM_WINRT
# define BGFX_SYMBOL_EXPORT __declspec(dllexport)
# define BGFX_SYMBOL_IMPORT __declspec(dllimport)
#else