> VOID ReadExternalAttribute(
>   PNONRESIDENT_ATTRIBUTE attr,
>   ULONGLONG vcn, ULONG count, PVOID buffer)
> {
>   ULONGLONG lcn, runcount;
>   ULONG readcount, left;
>   PUCHAR bytes = PUCHAR(buffer);
> 
>   for (left = count; left > 0; left -= readcount) {
>     FindRun(attr, vcn, &lcn, &runcount);
> 
>     readcount = ULONG(min(runcount, left));
> 
>     ULONG n = readcount * bootb.BytesPerSector *
> bootb.SectorsPerCluster;
> 
>     if (lcn == 0)
>       memset(bytes, 0, n);
>     else
>       ReadLCN(lcn, readcount, bytes);
> 
>     vcn += readcount; //Вот здесь непонятки ;-)
>     bytes += n;
>   }
> }
>