>Hi Segey, i hope this article could help:
>
>How to Use the GetVolumeInformation API Call

Thanx for advice. But look -
lpVolumeNameBuffer, ;
nVolumeNameSize, ;
lpVolumeSerialNumber, ;
lpMaximumComponentLength, ;
lpFileSystemFlags, ;
lpFileSystemNameBuffer, ;
nFileSystemNameSize

What of above items can reliably identify the computer ? lpVolumeNameBuffer,
nVolumeNameSize and lpVolumeSerialNumber can be freely changed by user.
lpMaximumComponentLength,lpFileSystemFlags,lpFileSystemNameBuffer and
nFileSystemNameSize in most cases are the same for different machines. We can use them only as _additional_ data. So, we need more hardware parameters to check for.

Sergey Rewa
reware@cafe.redcom.ru