Fijate si te sirve este código (no es mio):
Private Const INTERNET_CONNECTION_CONFIGURED = &H40
Private Const INTERNET_CONNECTION_LAN = &H2
Private Const INTERNET_CONNECTION_MODEM = &H1
Private Const INTERNET_CONNECTION_OFFLINE = &H20
Private Const INTERNET_CONNECTION_PROXY = &H4
Private Const INTERNET_RAS_INSTALLED = &H10
Private Declare Function InternetGetConnectedState Lib "wininet.dll" (ByRef lpdwFlags As Long, ByVal dwReserved As Long) As Long
Private Sub Form_Load()
'KPD-Team 2001
'URL:
http://www.allapi.net/
'E-Mail:
[email protected]
Dim Ret As Long
Me.AutoRedraw = True
'retrieve the connection status
InternetGetConnectedState Ret, 0&
'show the result
If (Ret And INTERNET_CONNECTION_CONFIGURED) = INTERNET_CONNECTION_CONFIGURED Then Me.Print "Local system has a valid connection to the Internet, but it may or may not be currently connected."
If (Ret And INTERNET_CONNECTION_LAN) = INTERNET_CONNECTION_LAN Then Me.Print "Local system uses a local area network to connect to the Internet."
If (Ret And INTERNET_CONNECTION_MODEM) = INTERNET_CONNECTION_MODEM Then Me.Print "Local system uses a modem to connect to the Internet."
If (Ret And INTERNET_CONNECTION_OFFLINE) = INTERNET_CONNECTION_OFFLINE Then Me.Print "Local system is in offline mode."
If (Ret And INTERNET_CONNECTION_PROXY) = INTERNET_CONNECTION_PROXY Then Me.Print "Local system uses a proxy server to connect to the Internet."
If (Ret And INTERNET_RAS_INSTALLED) = INTERNET_RAS_INSTALLED Then Me.Print "Local system has RAS installed."
End Sub
'Example by Vijay Phulwadhawa (
[email protected])
Private Declare Function InternetGetConnectedStateEx Lib "wininet.dll" (ByRef lpdwFlags As Long, ByVal lpszConnectionName As String, ByVal dwNameLen As Integer, ByVal dwReserved As Long) As Long
Dim sConnType As String * 255
Private Sub Form_Load()
Dim Ret As Long
Ret = InternetGetConnectedStateEx(Ret, sConnType, 254, 0)
If Ret = 1 Then
MsgBox "You are connected to Internet via a " & sConnType, vbInformation
Else
MsgBox "You are not connected to internet", vbInformation
End If
End Sub
. La cuestion es q lo hice para q yo tenga q activarlo y desactivarlo cuando me conecto y me desconecto, y quisiera saber... es muy jodido hacer que detecte solito cuando se inicia una sesion de internet y cuando esta se cierra???.. y si alguien me puede facilitar el codigo para lograr esto me ayudaria mucho!! 
