Cancels the stream and discards any sound data.
No errors - stream destroyed successfully.
The operation failed becasue the port was shutting down.
The port is not valid (either CreateClient has not been called or DestroyClient has been called prior to this call).
An exception occurred while processing the request.
Cancels the stream. Used in case a WaitForDecode function is not terminating or if end of speech has not been detected. This readies the port to start a new stream, if StreamStart is called.