[Amin_Mansouri]

کد:

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

Sub CheckNetCon()
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

Private Sub Form_Load()
CheckNetCon
End Sub