DLL_SERIALIZATION_CORE.h

    class A
    {
        template<typename Archive>
        void serialize(Archive& ar, int version);
    };

    class B
    {
        template<typename Archive>
        void serialize(Archive& ar, int version);
        
        A a;
        A* pA;
    };
    
    class XmlOutArchive : public VxPersistence::VxArchive, public boost::archive::xml_oarchive_impl<XmlOutArchive>
    {
    public:
        XmlOutArchive(std::ostream & os, unsigned int saveFlags, unsigned int boostFlags = 0);
        ~XmlOutArchive();
    };

    class XmlInArchive : public VxPersistence::VxArchive, public boost::archive::xml_iarchive_impl<XmlInArchive>, public boost::archive::detail::shared_ptr_helper
    {
    public:
        XmlInArchive(std::istream & is, unsigned int loadFlags, unsigned int boostFlags = 0);
        ~XmlInArchive();
    };

DLL_SERIALIZATION_CORE.cpp
    template<typename Archive>
    void A::serialize(Archive& ar, int version)
    {
    }
    
    template<typename Archive>
    void B::serialize(Archive& ar, int version)
    {
        ar & a;
        ar & pA;
    }

    BOOST_SERIALIZATION_REGISTER_ARCHIVE(XmlOutArchive)
    BOOST_SERIALIZATION_REGISTER_ARCHIVE(XmlInArchive)
    template EXPORT_DECLSPEC void A::serialize(XmlOutArchive& ar, const unsigned int version);
    template EXPORT_DECLSPEC void B::serialize(XmlOutArchive& ar, const unsigned int version);
    template EXPORT_DECLSPEC void A::serialize(XmlInArchive& ar, const unsigned int version);
    template EXPORT_DECLSPEC void B::serialize(XmlInArchive& ar, const unsigned int version);
    
DLL_SERIALIZATION_EXTENSION.h

    class C
    {
        template<typename Archive>
        void serialize(Archive& ar, int version);
        
        A a;
    };

DLL_SERIALIZATION_EXTENSION.cpp
    
    template<typename Archive>
    void C::serialize(Archive& ar, int version)
    {
        ar & a;
    }

    template EXPORT_DECLSPEC void C::serialize(XmlOutArchive& ar, const unsigned int version);
    template EXPORT_DECLSPEC void C::serialize(XmlInArchive& ar, const unsigned int version);
    
APPLICATION_MAIN.cpp

    C c;
    
    XmlInArchive archive;
    archive >> c;