--- /dev/null
+#ifndef MSP_GLTK_API_H_
+#define MSP_GLTK_API_H_
+
+#if defined(_WIN32)
+#if defined(MSPGLTK_BUILD)
+#define MSPGLTK_API __declspec(dllexport)
+#elif defined(MSPGLTK_IMPORT)
+#define MSPGLTK_API __declspec(dllimport)
+#else
+#define MSPGLTK_API
+#endif
+#elif defined(__GNUC__)
+#define MSPGLTK_API __attribute__((visibility("default")))
+#else
+#define MSPGLTK_API
+#endif
+
+#endif