GLUTAPI int GLUTAPIENTRY glutLayerGet(GLenum type);
#endif
#if (GLUT_API_VERSION >= 5)
-GLUTAPI void * GLUTAPIENTRY glutGetProcAddress(const char *procName);
+typedef void (*GLUTproc)();
+GLUTAPI GLUTproc GLUTAPIENTRY glutGetProcAddress(const char *procName);
#endif
/* GLUT font sub-API */