Hi I am using boost serialization to synchronise objects between different computers (network). The objects would be serializated as a string instead of a file by using the class stringstream(instead of fstream). The string would be transferred via TCP/IP layer. Let simpify the situation as only two computers (Master and Slave) ,both of two computers have N objects and I wanna synchronise their content. I create a vector of pointer ( std::vector<base *> m_vpBase ) which points to the dirty objects. Both of two computers have this vector. Let assume the vectors are already pointing to the corresponding objects. For Tx side, it would serialize the objects as a string. For Rx side, I want to update the content of the objects that its vector is pointing to. Tx side: oa << BOOST_SERIALIZATION_NVP(m_vpBase); Rx side: oa >> BOOST_SERIALIZATION_NVP(m_vpBase ); However, the above code would construct new objects. What i want is just update the content of the objects , not construct new objects. I know how to update the content for one object by using pointer ( base * m_pBase). Tx side: oa << BOOST_SERIALIZATION_NVP(m_pBase); Rx side: oa >> BOOST_SERIALIZATION_NVP(*m_pBase); But, I don't know how to do for a vector of pointer. If you know, please give me some hints. Thank you very much. Regards Barr Ng [I found Boost serialization is useful and easy to use. ] _________________________________________________________________ No masks required! Use MSN Messenger to chat with friends and family. http://go.msnserver.com/HK/25382.asp