export.h

#ifndef VNEXPORT_H_INCLUDED
#define VNEXPORT_H_INCLUDED

/* Not only does this have to be windows to use __declspec */
/* it also needs to actually be outputting a DLL */
#if defined _WINDOWS && defined _WINDLL
    #if proglib_c_EXPORTS
        #define DllExport __declspec(dllexport)
    #else
        #define DllExport __declspec(dllimport)
    #endif
#else
    #define DllExport
#endif

#endif