This method is called
only if you have implemented the
IwodVPNNotify interface in your
application and the wodVPN1.Notification
property has received a reference to an instance of your implementation.
IncomingData notification method is called when remote side has sent us some data using
SendData method. You should retrieve it as byte array (for C++ users this is SAFEARRAY(VT_ARRAY | VT_UI1).
If you prefer to send/receive text messages, use
SendText so that
IncomingText notification method is called instead.