New Post: field_map is not a member of web::json::Value

int _tmain(int argc, _TCHAR* argv[])
{
                 listener.support(methods::POST, handle_post);
}

void handle_get(http_request request)
{   
    //TRACE(L"\nhandle GET\n");    
    
    json::value::field_map answer;    

    for(auto const & p : dictionary)   
    {      
        answer.push_back(make_pair(json::value(p.first), json::value(p.second)));   
    }    
    request.reply(status_codes::OK, json::value::object(answer));
}