Const INTERNET_DIALSTATE_DISCONNECTED = 1 Const INTERNET_AUTODIAL_FORCE_ONLINE = 1 Const INTERNET_AUTODIAL_FORCE_UNATTENDED = 2 Const INTERNET_DIAL_UNATTENDED = &H8000Dim iHandle As LongPrivate Declare Function InternetDial Lib "wininet.dll" ( _ ByVal hwndParent As Long, _ ByVal lpszConnectoid As String, _ ByVal dwFlags As Long, _ lpdwConnection As Long, _ ByVal dwReserved As Long) As Long
'参数dwConnection指定拨号连接句柄 Private Declare Function InternetHangUp Lib "wininet.dll" _ (ByVal dwConnection As Long, _ ByVal dwReserved As Long) As Long
Private Declare Function InternetAutodial Lib "wininet.dll" _ (ByVal dwFlags As Long, ByVal dwReserved As Long) As Long
Private Declare Function InternetAutodialHangup Lib "wininet.dll" _ (ByVal dwReserved As Long) As Long
Private Sub Command1_Click() '建立名称为163的连接,连接成功后连接句柄保存在iHandel中 InternetDial Me.hWnd, "163", INTERNET_AUTODIAL_FORCE_UNATTENDED, iHandle, 0 End SubPrivate Sub Command2_Click() If iHandle <> 0 Then InternetHangUp iHandle, 0 iHandle = 0 End If End SubPrivate Sub Form_Load() Command1.Caption = "拨号" Command2.Caption = "断开" End Sub
参考一下这个Public Declare Function InternetGetConnectedStateEx Lib "wininet.dll" _ Alias "InternetGetConnectedStateExA" _ (ByRef lpdwFlags As Long, _ ByVal lpszConnectionName As String, _ ByVal dwNameLen As Long, _ ByVal dwReserved As Long _ ) As LongPublic Enum EIGCInternetConnectionState INTERNET_CONNECTION_MODEM = &H1& INTERNET_CONNECTION_LAN = &H2& INTERNET_CONNECTION_PROXY = &H4& INTERNET_RAS_INSTALLED = &H10& INTERNET_CONNECTION_OFFLINE = &H20& INTERNET_CONNECTION_CONFIGURED = &H40& End EnumPublic Property Get InternetConnected( _ Optional ByRef eConnectionInfo As EIGCInternetConnectionState, _ Optional ByRef sConnectionName As String _ ) As Boolean Dim dwFlags As Long Dim sNameBuf As String Dim lR As Long Dim iPos As Long
sNameBuf = String$(513, 0) lR = InternetGetConnectedStateEx(dwFlags, sNameBuf, 512, 0&) eConnectionInfo = dwFlags iPos = InStr(sNameBuf, vbNullChar) If iPos > 0 Then sConnectionName = Left$(sNameBuf, iPos - 1) ElseIf Not sNameBuf = String$(513, 0) Then sConnectionName = sNameBuf End If InternetConnected = (lR = 1) End Property
Dim eR As EIGCInternetConnectionState Dim sMsg As String Dim sName As String Dim bConnected As BooleanPrivate Sub Form_Load() ' Determine whether we have a connection: bConnected = InternetConnected(eR, sName) ' The connection state info parameter provides details ' about how we connect: If (eR And INTERNET_CONNECTION_MODEM) = INTERNET_CONNECTION_MODEM Then sMsg = sMsg & "Connection uses a modem." & vbCrLf End If If (eR And INTERNET_CONNECTION_LAN) = INTERNET_CONNECTION_LAN Then sMsg = sMsg & "Connection uses LAN." & vbCrLf End If If (eR And INTERNET_CONNECTION_PROXY) = INTERNET_CONNECTION_PROXY Then sMsg = sMsg & "Connection is via Proxy." & vbCrLf End If If (eR And INTERNET_CONNECTION_OFFLINE) = INTERNET_CONNECTION_OFFLINE Then sMsg = sMsg & "Connection is Off-line." & vbCrLf End If If (eR And INTERNET_CONNECTION_CONFIGURED) = INTERNET_CONNECTION_CONFIGURED Then sMsg = sMsg & "Connection is Configured." & vbCrLf Else sMsg = sMsg & "Connection is Not Configured." & vbCrLf End If If (eR And INTERNET_RAS_INSTALLED) = INTERNET_RAS_INSTALLED Then sMsg = sMsg & "System has RAS installed." & vbCrLf End If
' Display the connection name and info: If bConnected Then Text1.Text = "Connected: " & sName & vbCrLf & vbCrLf & sMsg Else Text1.Text = "Not Connected: " & sName & vbCrLf & vbCrLf & sMsg End If End Sub
Const INTERNET_AUTODIAL_FORCE_ONLINE = 1
Const INTERNET_AUTODIAL_FORCE_UNATTENDED = 2
Const INTERNET_DIAL_UNATTENDED = &H8000Dim iHandle As LongPrivate Declare Function InternetDial Lib "wininet.dll" ( _
ByVal hwndParent As Long, _
ByVal lpszConnectoid As String, _
ByVal dwFlags As Long, _
lpdwConnection As Long, _
ByVal dwReserved As Long) As Long
'参数dwConnection指定拨号连接句柄
Private Declare Function InternetHangUp Lib "wininet.dll" _
(ByVal dwConnection As Long, _
ByVal dwReserved As Long) As Long
Private Declare Function InternetAutodial Lib "wininet.dll" _
(ByVal dwFlags As Long, ByVal dwReserved As Long) As Long
Private Declare Function InternetAutodialHangup Lib "wininet.dll" _
(ByVal dwReserved As Long) As Long
Private Sub Command1_Click()
'建立名称为163的连接,连接成功后连接句柄保存在iHandel中
InternetDial Me.hWnd, "163", INTERNET_AUTODIAL_FORCE_UNATTENDED, iHandle, 0
End SubPrivate Sub Command2_Click()
If iHandle <> 0 Then
InternetHangUp iHandle, 0
iHandle = 0
End If
End SubPrivate Sub Form_Load()
Command1.Caption = "拨号"
Command2.Caption = "断开"
End Sub
Alias "InternetGetConnectedStateExA" _
(ByRef lpdwFlags As Long, _
ByVal lpszConnectionName As String, _
ByVal dwNameLen As Long, _
ByVal dwReserved As Long _
) As LongPublic Enum EIGCInternetConnectionState
INTERNET_CONNECTION_MODEM = &H1&
INTERNET_CONNECTION_LAN = &H2&
INTERNET_CONNECTION_PROXY = &H4&
INTERNET_RAS_INSTALLED = &H10&
INTERNET_CONNECTION_OFFLINE = &H20&
INTERNET_CONNECTION_CONFIGURED = &H40&
End EnumPublic Property Get InternetConnected( _
Optional ByRef eConnectionInfo As EIGCInternetConnectionState, _
Optional ByRef sConnectionName As String _
) As Boolean
Dim dwFlags As Long
Dim sNameBuf As String
Dim lR As Long
Dim iPos As Long
sNameBuf = String$(513, 0)
lR = InternetGetConnectedStateEx(dwFlags, sNameBuf, 512, 0&)
eConnectionInfo = dwFlags
iPos = InStr(sNameBuf, vbNullChar)
If iPos > 0 Then
sConnectionName = Left$(sNameBuf, iPos - 1)
ElseIf Not sNameBuf = String$(513, 0) Then
sConnectionName = sNameBuf
End If
InternetConnected = (lR = 1)
End Property
Dim sMsg As String
Dim sName As String
Dim bConnected As BooleanPrivate Sub Form_Load()
' Determine whether we have a connection:
bConnected = InternetConnected(eR, sName) ' The connection state info parameter provides details
' about how we connect:
If (eR And INTERNET_CONNECTION_MODEM) = INTERNET_CONNECTION_MODEM Then
sMsg = sMsg & "Connection uses a modem." & vbCrLf
End If
If (eR And INTERNET_CONNECTION_LAN) = INTERNET_CONNECTION_LAN Then
sMsg = sMsg & "Connection uses LAN." & vbCrLf
End If
If (eR And INTERNET_CONNECTION_PROXY) = INTERNET_CONNECTION_PROXY Then
sMsg = sMsg & "Connection is via Proxy." & vbCrLf
End If
If (eR And INTERNET_CONNECTION_OFFLINE) = INTERNET_CONNECTION_OFFLINE Then
sMsg = sMsg & "Connection is Off-line." & vbCrLf
End If
If (eR And INTERNET_CONNECTION_CONFIGURED) = INTERNET_CONNECTION_CONFIGURED Then
sMsg = sMsg & "Connection is Configured." & vbCrLf
Else
sMsg = sMsg & "Connection is Not Configured." & vbCrLf
End If
If (eR And INTERNET_RAS_INSTALLED) = INTERNET_RAS_INSTALLED Then
sMsg = sMsg & "System has RAS installed." & vbCrLf
End If
' Display the connection name and info:
If bConnected Then
Text1.Text = "Connected: " & sName & vbCrLf & vbCrLf & sMsg
Else
Text1.Text = "Not Connected: " & sName & vbCrLf & vbCrLf & sMsg
End If
End Sub