UpnpRenewSubscriptionAsync renews a subscription that is about to expire, generating a callback when the operation is complete.
UpnpRenewSubscriptionAsync renews a subscription that is about to expire, generating a callback when the operation is complete.Note that many of the error codes for this function are returned in the Upnp_Event_Subscribe structure. In those cases, the function returns UPNP_E_SUCCESS and the appropriate error code will be in the Upnp_Event_Subscribe.ErrCode field in the Event structure passed to the callback.