The NDK is a set of classes that implements a client/server architecture. The NDK hides all the complexity of the connection, sending, and receiving of data over a network. You only have to deal with three classes: CNDKServer, CNDKClient, and CNDKMessage. With just a few methods to override, you obtain a complete robust client/server application. The NDK is based on the class CSocket from MFC, so you can run your application on a local network or on the Internet without any change. To easily understand the integration of the NDK in an application, you ll find at the end of this article a complete chat application.-The NDK is a set of classes that implements a client / server architecture. The NDK hides all the complexity of the connection, sending, and receiving of data over a network. You only ha 've to deal with three classes : CNDKServer. CNDKClient. and CNDKMessage. With just a few methods to over ride, you obtain a complete robust client / server app lication. The NDK is based on the class CSocket f rom MFC. so you can run your application on a local networ k or on the Internet without any change. To easil y understand the integration of the NDK in an app lication. you'll find at the end of this article a complete c hat application.