（英文原版）这本书关注与Winsock网络编程技术。主要包括接口API，.net sockets,vb Winsock控制，RAS，IP Helper API 等-This book primarily focuses on the Winsock network programming technology. This book covers six technical areas:

Winsock application programming interface (API)

.NET Sockets (from C#)

Visual Basic Winsock Control

Client Remote Access Server (RAS)

IP Helper API

Legacy Networking—NetBIOS and the Windows redirector