Hi: The current serialization implementation for std::wstring is not portable across platforms. To make it cross platform, we would like to customize the serialization implementation for std::wstring (by splitting "serialize" and providing our own implementation for "save/load"). Is it possible to achieve this? One way to get around this is to provide our own implementation, and not include the header boost/serialization/string.hpp. This is not an option to us as there is no way for us to enforce clients to not include this header at all either directly or indirectly. And unfortunately, the compiler does not complain if the same compilation unit has two different serialization mechanism for std::wstring (the builtin and customized serialization implementation, in which case the builtin serialization implementation is picked, which is not portable). Many Thanks AB