This thesis concerns the design of a TCP/IP network application for playing the game of Go on the Internet. It is implemented in Visual Basic 5.0. TCP/IP and Window Socket is used in this project for data commutation on the network. TCP/IP is a dominant protocol for data communications on the Internet. Numerous application services have been developed for transport using the TCP/IP protocol suite. This project, playing Go on the network, introduces the basic concepts of TCP/IP, and demonstrates how to transfer data among processes in client/server models. A software component, A socket derived from Mabry Software, Inc., is used in this project. It is a windows custom control that provides easy access to TCP network services, and can be used in many development environments, such as Visual Basic, Visual C++, MS Access or Visual FoxPro.