Could you any one help me to use the "UpnpNotifyExt()" API.  I am very clear from the document, what the API will do, but I need some help to understand the second and third argument ( DevID, ServID).

In the Overall UPnP API the DevID and ServID not available to Application directly, So could any how tell me how to use these argument.

Example : I want to notify the TransportState through LastChange variable in AVT Service.

Thanks in Advance