>I need to read Disk Serial Number or some other unique
>number of a NTFS disk for copy protection. It is allowed
>that this number may change when disk is re-formatted or
>re-created.
>
>However, it seems that Get Volume Information API call
>will not return such information for NTSF disks.
>
>Is it possible to get this for NTFS disks ?

It's trivial - use the Scripting.FileSystemObject from the Windows Script Host, open a drive object and examine the serial number.