internal extern static int WWSASGetKsFormatSupportedFmtNth( int instanceId, int idx, int nth, ref NativeKsFormat param_return);
internal extern static int WWSASGetKsFormatpreferredFmt( int instanceId, int idx, ref NativeKsFormat param_return);
internal extern static int WWSASGetKsFormatSupportedFmtNth( int instanceId, int idx, int nth, ref NativeKsFormat param_return);
internal extern static int WWSASGetKsFormatpreferredFmt( int instanceId, int idx, ref NativeKsFormat param_return);