Record WCF duplex communication

WCF (Windows Communication Foundation) is a programming model that unifies Web Services, .NET Remoting, Distributed Transactions, and Message Queues into a single Service-oriented programming model for distributed computing.

WCF creates a proxy object to provide data for the service. It also marshals the data returned by the service into the form expected by the caller.

In addition to general support for the WCF environment, VuGen provides specialized support for applications that use WCF's duplex communication. In duplex communication, the client proxy contacts the service, and the service invokes the callback handler on the client machine. The callback handler implements a callback interface defined by the server. The server does not have to respond in a synchronous manner—it independently determines when to respond and invoke the callback handler.