Const NETWORK_ALIVE_AOL = &H4
Const NETWORK_ALIVE_LAN = &H1
Const NETWORK_ALIVE_WAN = &H2
Private Declare Function IsNetworkAlive Lib "SENSAPI.DLL" (ByRef lpdwFlags As _
  Long) As Long
Private Sub Form_Load()
    'KPD-Team 2001
    'URL: http://www.allapi.net/
    'E-Mail: KPDTeam@Allapi.net
    Dim Ret As Long
    If IsNetworkAlive(Ret) = 0 Then
        MsgBox "The local system is not connected to a network!"
    Else
        MsgBox "The local system is connected to a " + IIf(Ret = _
          NETWORK_ALIVE_AOL, "AOL", IIf(Ret = NETWORK_ALIVE_LAN, "LAN", "WAN")) _
          + " network!"
    End If
End Sub

Wird schon schief gehen ;)
Murphie