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

Function GetVolumn(X As String) As String
If Len(X) < 3 Then
X = Left(X, 1) & ":\"
Else
X = Left(X, 3)
End If
Dim nRet As Long, VolName As String, VolSN As Long, MaxCompLen As Long
Dim VolFlags As Long, VolFileSys As String
VolName = Space$(256)
VolFileSys = Space$(256)
nRet = GetVolumeInformation(X, VolName, Len(VolName), _
VolSN, MaxCompLen, VolFlags, _
VolFileSys, Len(VolFileSys))
If nRet = 1 Then
GetVolumn = VolName
Else
GetVolumn = ""
End If
End Function

Function GetNumber(X As String) As String
If Len(X) < 3 Then
X = Left(X, 1) & ":\"
Else
X = Left(X, 3)
End If
Dim nRet As Long, VolName As String, VolSN As Long, MaxCompLen As Long
Dim VolFlags As Long, VolFileSys As String
VolName = Space$(256)
VolFileSys = Space$(256)
nRet = GetVolumeInformation(X, VolName, Len(VolName), _
VolSN, MaxCompLen, VolFlags, _
VolFileSys, Len(VolFileSys))
If nRet = 1 Then
GetNumber = VolSN
Else
GetVolumn = ""
End If
End Function