#ifdef A_SOURCE
#  define A_DECL __declspec(dllexport)
#else
#  define A_DECL __declspec(dllimport)
#endif  

#define BOOST_ALL_DYN_LINK //Always use dynamic linking
#define BOOST_ALL_NO_LIB   //Newer link automagically
#include <boost/serialization/nvp.hpp>

#include <string>
#include "X.hpp"

class A_DECL A
{
public:
    A(const std::string&, float);

    template<class Archive>
    void serialize(Archive& ar, const unsigned int version)
    {
        ar & boost::serialization::make_nvp("foo", foo);
        ar & boost::serialization::make_nvp("bar", bar);
    }

    std::string foo;
    X bar;
};

A_DECL void load(A&);
A_DECL void save(const A&);