FS_VOLUME_CAPABILITY_OPEN_QUERY
if (!HasCapability(FS_VOLUME_CAPABILITY_OPEN_QUERY))
CLEAR_UNSUPPORTED(FS_VOLUME_CAPABILITY_OPEN_QUERY, open_query);
fVolumeCapabilities.Set(FS_VOLUME_CAPABILITY_OPEN_QUERY,
fCapabilities.Set(FS_VOLUME_CAPABILITY_OPEN_QUERY, fVolume.ops->open_query);