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Dicas
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Visual Basic (Internet)
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Título da Dica: Descobrindo se o usuário está conectado à Interntet com API
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Postada em 5/11/2003 por Tekki
'Adicione um Button e use este código no form.
Private Declare Function InternetGetConnectedState Lib "wininet" (ByRef dwflags As Long, ByVal dwReserved As Long) As Long
Private Const CONNECT_LAN As Long = &H2
Private Const CONNECT_MODEM As Long = &H1
Private Const CONNECT_PROXY As Long = &H4
Private Const CONNECT_OFFLINE As Long = &H20
Private Const CONNECT_CONFIGURED As Long = &H40
Public Function IsWebConnected(Optional ByRef ConnType As String) As Boolean
Dim dwflags As Long
Dim WebTest As Boolean
ConnType = ""
WebTest = InternetGetConnectedState(dwflags, 0&)
Select Case WebTest
Case dwflags And CONNECT_LAN: ConnType = "LAN"
Case dwflags And CONNECT_MODEM: ConnType = "Modem"
Case dwflags And CONNECT_PROXY: ConnType = "Proxy"
Case dwflags And CONNECT_OFFLINE: ConnType = "Offline"
Case dwflags And CONNECT_CONFIGURED: ConnType = "Configurada"
Case dwflags And CONNECT_RAS: ConnType = "Remota"
End Select
IsWebConnected = WebTest
End Function
Private Sub Command1_Click()
Dim msg As String
If IsWebConnected(msg) Then
msg = "Você está conectado à Internet via: " & msg
Else
msg = "Você não está conectado à Internet."
End If
MsgBox msg, vbOKOnly, "Estado de conexão à Internet"
End Sub
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