GetVolumeInformationA - Hard Drive Serial Number

Hi Everyone,

Can someone tell me if the GetVolumeInformationA function of the kernel32.dll is the physical[/B] hard driive serial number or the serial number of the volume that can be changed on a reformat.

If it is the volume serial number can someone tell me how to get the physical serial number of the hard drive.

:) Thanx a mill :)

Needaname16

You're confusing volume label with serial number. It's what you want.

Try this out:

VB Code:

Private Declare Function GetVolumeInformation Lib "kernel32" Alias "GetVolumeInformationA" (ByVal lpRootPathName As String, ByVal lpVolumeNameBuffer As String, ByVal nVolumeNameSize As Long, lpVolumeSerialNumber As Long, lpMaximumComponentLength As Long, lpFileSystemFlags As Long, ByVal lpFileSystemNameBuffer As String, ByVal nFileSystemNameSize As Long) As Long
 
Private Sub GetVolume(PathName As String, DrvVolumeName As String, DrvSerialNo As String) 
  
   Dim r As Long
   Dim pos As Integer
   Dim hword As Long
   Dim HiHexStr As String
   Dim lword As Long
   Dim LoHexStr As String
   Dim VolumeSN As Long
   Dim MaxFNLen As Long
   Dim UnusedStr As String
   Dim UnusedVal1 As Long
   Dim UnusedVal2 As Long
  'pad the strings
   DrvVolumeName$ = Space$(14)
   UnusedStr$ = Space$(32)
  'do what it says
   r = GetVolumeInformation(PathName, DrvVolumeName, Len(DrvVolumeName), VolumeSN&, UnusedVal1, UnusedVal2, UnusedStr, Len(UnusedStr$))
  'error check
   If r& = 0 Then Exit Sub
  'determine the volume label
   pos = InStr(DrvVolumeName, Chr$(0))
   If pos Then DrvVolumeName = Left$(DrvVolumeName, pos - 1)
   If Len(Trim$(DrvVolumeName)) = 0 Then DrvVolumeName = "(no label)"
   hword = HiWord(VolumeSN)
   lword = LoWord(VolumeSN)
   HiHexStr = Format$(Hex(hword), "0000")
   LoHexStr = Format$(Hex(lword), "0000")
   DrvSerialNo = HiHexStr & "-" & LoHexStr
 
End Sub
 
Private Function HiWord(dw As Long) As Integer  
    HiWord = (dw And &HFFFF0000) \ &H10000
End Function  
 
Private Function LoWord(dw As Long) As Integer
  
    If dw And &H8000& Then
        LoWord = dw Or &HFFFF0000
    Else
        LoWord = dw And &HFFFF&
    End If
    
End Function
 
'To Display The Volume Name And Serial Number:
Dim PathName As String
   Dim DrvVolumeName As String
   Dim DrvSerialNo As String
   PathName$ = "c:\"
   GetVolume PathName, DrvVolumeName, DrvSerialNo
   MsgBox "Drive Statistics for " & UCase$(PathName) & ": " & "Volume Label " & DrvVolumeName & ", " & "Volume Serial No " & DrvSerialNo