The BuffersWritten (Get) method retrieves the BuffersWritten property, as specified in the property table in section 3.2.4.9.
[propget] HRESULT BuffersWritten( [out, retval] unsigned long* buffers );
buffers: Receives the number of buffers accepted. The valid range is from 0x00000000 through 0xFFFFFFFF inclusive.
Return Values: This method MUST return an HRESULT with the severity bit clear on success as specified in [MS-ERREF]; otherwise, it MUST return one of the errors as defined in 2.2.1 or one of the errors as defined in [MS-ERREF] section 2.1.