>That's not a problem in this case. All I want is to get the serial number for the drive where my app is installed in order to implement a licencing system. The app will always be on a local hard drive, but any of Win95/98/ME/NT4/Y2K (XP ...) and any of FAT/FAT32/NTFS and any partition configuration.
>
>I am still amazed that the problems with GetVolumeInformation (if that is so), known for years and years, could be repackaged into an 'new' MS technology with current download status.
>
>I'm waiting on a test site to reply with the results of a small test app.

John

On my Win2K box, which uses NTFS, the SerialNumber property returns a negative value. The only place where I can't get a serial number is for remote drive running under Novell.

As for the licensing scheme, be aware that serial numbers can and do change.