This event is raised when new incoming SIP request is received. You can control incoming requests with that event. For example you can require authentication or send what ever error to request maker user.

public event SIP_Stack.ValidateRequestEventHandler ValidateRequest

Public Event ValidateRequest As ValidateRequestEventHandler

public:
 event ValidateRequestEventHandler^ ValidateRequest {
	void add (ValidateRequestEventHandler^ value);
	void remove (ValidateRequestEventHandler^ value);
}