Data communications (computer communications) is commonly used in everyday life. What makes it possible? Largely the TCP/IP protocol. In this thesis, we study how TCP/IP works with a socket of an application program and how the Visual Basic socket custom control works with TCP/IP in a Microsoft Windows implementation. In this project, we use Visual Basic to implement a Network Whiteboard application. Whiteboard is an interactive, two-view environment, in which users can create programs by manipulating concrete pictorial data or examples of data structures, or by entering it into a text editor. The users can move back and forth between the visual and text Editors. By providing both a visual and a textual representation, it should be possible to determine those operations which a programmer views as intrinsically visual on one hand and textual on the other