// These routines are for testing IWMWriterAdvanced
private void TestAdvanced(Bitmap b)
{
IWMWriterAdvanced adv = m_Writer as IWMWriterAdvanced;
WriterStatistics ws;
adv.GetStatistics(0, out ws);
Debug.Assert(ws.dwCurrentBitrate > 0);
INSSBuffer pSample = WriteOne(b);
adv.WriteStreamSample(1, 1234, 5678, 101001, SampleFlag.CleanPoint, pSample);
}