The GetDiskSerial.DLL is a standard 32-bit DLL file.You can via it easily read the hard drive physics sequence number, say theoretically that come to this sequence number is unique in the world, so you can via this sequence number to do something, for example:Via this sequence number to produce an encrypts the ID.

The GetDiskSerial.DLL hases already in Delphi, Visual Basic, PowerBuilder and Visual Foxpro succeed to get the SerialNumber, You can download here above develop language example at this site.