The RequestReceivedEventArgsclass defines information to an application regarding the arrival of a SIP request.

When a request has been successfully dispatched by the MSPL message filter (see the Dispatch built-in function), an event containing a RequestReceivedEventArgsobject will be dispatched to the specified method (whose signature must match the ResponseReceivedEventHandler delegate). RequestReceivedEventArgscontains the request as the Request property.

An instance of ServerTransaction is created as a property of RequestReceivedEventArgs. This property represents the new servertransaction for the request. To forward this request, call CreateBranch () () () () to create a ClientTransaction and call SendRequest(Request) , passing the Request object in the RequestReceivedEventArgs.Requestproperty.