[boost] Self Contained Transportable Class :

Hi I am trying to create a self contained transportable class which can be migrated to any machine by calling a member function in it. I am having the socket stream implementation which derives the transportable boost class. In the serialize function of the boost class, I am trying to get the string stream and trying to call network marshal function of the base class. How can I get the stream ( I am using a string stream ) from the archive class inside the serialize function. Rgds Rajeev