HD Serial Number

Can anyone tell me how to find out a Hard Disks Serial number using VB5, Thanks.
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watyConnect With a Mentor Commented:
Private Const MAX_FILENAME_LEN = 256

Private Declare Function GetVolumeInformation& Lib "Kernel32" Alias "GetVolumeInformationA" (ByVal lpRootPathName As String, ByVal pVolumeNameBuffer As String, ByVal nVolumeNameSize As Long, lpVolumeSerialNumber As Long, lpMaximumComponentLength As Long, lpFileSystemFlags As Long, ByVal lpFileSystemNameBuffer As String, ByVal nFileSystemNameSize As Long)

Public Function GetSerialNumber(sDrive As String) As Long
   Dim ser As Long
   Dim S As String * MAX_FILENAME_LEN
   Dim s2 As String * MAX_FILENAME_LEN
   Dim i As Long
   Dim j As Long
   Call GetVolumeInformation(sDrive + ":\" & Chr$(0), S, MAX_FILENAME_LEN, ser, i, j, s2, MAX_FILENAME_LEN)
   GetSerialNumber = ser
End Function

And my answer was (which waty beat me to):

Place the following code in the declarations section of a bas module:
Declare Function OpenFile Lib "kernel32" (ByVal lpFileName As String, lpReOpenBuff As OFSTRUCT, ByVal wStyle As Long) As Long
Declare Function GetFileInformationByHandle Lib "kernel32" (ByVal hFile As Long, lpFileInformation As BY_HANDLE_FILE_INFORMATION) As Long
Declare Function CloseHandle Lib "kernel32" (ByVal hObject As Long) As Long

Public Const OFS_MAXPATHNAME = 128
Public Const OF_READ = &H0
        cBytes As Byte
        fFixedDisk As Byte
        nErrCode As Integer
        Reserved1 As Integer
        Reserved2 As Integer
        szPathName(OFS_MAXPATHNAME) As Byte
End Type
Type FileTime
        dwLowDateTime As Long
        dwHighDateTime As Long
End Type
        dwFileAttributes As Long
        ftCreationTime As FileTime
        ftLastAccessTime As FileTime
        ftLastWriteTime As FileTime
        dwVolumeSerialNumber As Long
        nFileSizeHigh As Long
        nFileSizeLow As Long
        nNumberOfLinks As Long
        nFileIndexHigh As Long
        nFileIndexLow As Long
End Type

The following code will retrieve the volume serial number:
Private Sub Command1_Click()
    Dim lpReOpenBuff As OFSTRUCT
    Dim FileHandle As Long
    Dim Ret As Long
    FileHandle = OpenFile("c:\autoexec.bat", lpReOpenBuff, OF_READ)
    Ret = GetFileInformationByHandle(FileHandle, FileInfo)
    Print "Volume Serial Number is: " & FileInfo.dwVolumeSerialNumber
    Ret = CloseHandle(FileHandle)
End Sub

1. You must specify a file ("c:\autoexec.bat" in this example)
2. The volume serial number will be returned as a decimal.  You will have to convert it to a hex$ to make it look like what appears when to do a 'dir' in DOS
I only posted it, cause I hated to have to do that much work for nothing.  :)
Sorry ClifABB, the way you post it is very interesting for finding other informations about files.
I took it from MSDN online and trimmed the stuff that wasn't needed.  I like yours better, you don't have to specify a file.
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