The Windows Sockets protocol supports applications which communicate over the TCP/IP protocol using a Microsoft WinSock DLL. The WinSock protocol allows you to see the actual data sent and received by the buffers.
The WinSock protocol records functions that relate to the sockets, data buffers, and the Windows Sockets environment. Using VuGen, you record your application's API calls to the Winsock.dll or Wsock32.dll. For example, you could create a script by recording the actions of a telnet application. After creating a Winsock Vuser script, you can view the recorded buffers as raw data or as a snapshot. For details, see Windows Sockets Data or Windows Sockets Snapshots - Overview.