protected virtual void OnSIPMessageReceived(
	SIPMessageInfo sipMessage,
	string userName,
	Endpoint remoteEndpoint
)

Protected Overridable Sub OnSIPMessageReceived ( 
	sipMessage As SIPMessageInfo,
	userName As String,
	remoteEndpoint As Endpoint
)

protected:
virtual void OnSIPMessageReceived(
	SIPMessageInfo^ sipMessage, 
	String^ userName, 
	Endpoint^ remoteEndpoint
)