internal static extern NtStatus FilterVolumeInstanceFindNext( IntPtr hVolumeInstanceFind, INSTANCE_INFORMATION_CLASS dwInformationClass, SafeBuffer lpBuffer, int dwBufferSize, out int lpBytesReturned );
internal static extern NtStatus FilterVolumeInstanceFindFirst( string lpVolumeName, INSTANCE_INFORMATION_CLASS dwInformationClass, SafeBuffer lpBuffer, int dwBufferSize, out int lpBytesReturned, out IntPtr lpVolumeInstanceFind );