Calcular la etiqueta o label de un disco duro:

Hallar la etiqueta o label del mismo disco duro:

Escribir el siguiente código:

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)

Private Sub Form_Load()
  Dim cad1 As String * 256
  Dim cad2 As String * 256
  Dim numSerie As Long
  Dim longitud As Long
  Dim flag As Long
  unidad = "D:\"
  Call GetVolumeInformation(unidad, cad1, 256, numSerie, longitud, 
  flag, cad2, 256)
  MsgBox "Label de la unidad " & unidad & " = " & cad1
End Sub