How to do m_spPlayer->QueryInterface(&spSyncServices); in C#

Question

In Windows Media SDK Help to obtain IWMPSyncServices we using m_spPlayer->QueryInterface(&spSyncServices); But how can obtain IWMPSyncServices in C#. I tried to do in such way IWMPSyncServices ss = (IWMPSyncServices)Player; but ss comes null. How to do? Thanks!