Is the USN journal accessible from a VSS snapshot?

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http://serverfault.com – after creating a VSS snapshot I'd like to be able to query the USN journal. Is this possible or is the USN journal not accessable from a VSS snapshot? my steps right now are create VSS Snapshot open the snapshot with CreateFile(\?\GLOBALROOT\Device\HarddiskVolumeShadowCopy25) DeviceIoControl(FSCTL_QUERY_USN_JOURNAL) - this fails with GLE:1179 "the volume change journal is not active" I can simulate this from the commandline as follows C:\>vssadmin list shadows vssadmin 1.1 - Volume Shadow Copy Service administrative command-line tool (C) Copyright 2001-2005 Microsoft Corp. Contents o (HowTos)