[b]Api:[/b]
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)
[b]Y esto lo pones donde vas a llamar esa información:[/b]
Dim cad1 As String * 256
Dim cad2 As String * 256
Dim numSerie As Long
Dim longitud As Long
Dim flag As Long
Unidad = "C:"
Call GetVolumeInformation(Unidad, cad1, 256, numSerie, longitud, flag, cad2, 256)
MsgBox "Numero de Serie de la unidad " & Unidad & " = " & numSerie