Taking advantage of VSN, some software vendors use the Volume Serial Number to avoid pirate copying of their products. The VSN is changed anytime you format the disk, so if you re-install Windows and you format the system disk, Windows will ask again for activation. In simple words, the Volume Serial Number indicates the exact time of format operation. To bypass this problem, Microsoft and IBM decided to assign a new unique number in hexadecimal form (called 'Volume Serial Number' or 'Volume ID' or 'VSN') when a drive (optical disk or hard drive) was formatted. But that way, there was a problem if a user gave the same (Volume) name to two (or more) disks. By that time the only way to determine this, was the volume label (Volume Name) that the user defined to each storage disk. The Volume Serial Number was added by Microsoft and IBM so that the operating system could recognize if an optical disk or a drive is changed on the system.
If Not GetVolumeInformation("C:\", volumeName, 50, volSerialNumber, maxFileNameLen, fileSystemFlags, stringBuilder, 50) Thenĭim lastWin32Error As Integer = Marshal.The Volume Serial Number (also known as VSN) is a unique serial number that is assigned to an optical disk (CD or DVD) or a hard drive after formatting.
Private Sub Button4_Click(sender As System.Object, e As System.EventArgs) Handles Button4.Clickĭim volumeName As StringBuilder = New StringBuilder(50)ĭim stringBuilder As StringBuilder = New StringBuilder(50) ' Declaration found in 32Nativeįriend Declare Auto Function GetVolumeInformation Lib "kernel32.dll" (drive As String, volumeName As StringBuilder, volumeNameBufLen As Integer, ByRef volSerialNumber As Integer, ByRef maxFileNameLen As Integer, ByRef fileSystemFlags As Integer, fileSystemName As StringBuilder, fileSystemNameBufLen As Integer) As Boolean
I took a look with ILSpy ( ) to System.IO.DriveInfo class and I figured out
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