怎样判断自己的电脑已经连接到宽带ADSL.

[KissRose]

请指教，在此先谢过了。

[熊孩子开学喽]

很简单,通过程序PING一个外部地址,比如163的.
看返回值如果PING值为65535则说明没有通.

[迈克揉索芙特]

'网络状态
Private 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 Long
Private Declare Function InternetGetConnectedState Lib "wininet.dll" (ByRef dwFlags As Long, ByVal dwReserved As Long) As Long
Private Const INTERNET_CONNECTION_MODEM As Long = &H1 '本系统使用调制解调器与因特网相连
Private Const INTERNET_CONNECTION_LAN As Long = &H2 '本系统通过LAN与因特网相连
Private Const INTERNET_CONNECTION_PROXY As Long = &H4 '本系统使用proxy代理服务器与因特网相连
Private Const INTERNET_CONNECTION_MODEM_BUSY As Long = &H8 '未使用
Private Const INTERNET_RAS_INSTALLED As Long = &H10
Private Const INTERNET_CONNECTION_OFFLINE As Long = &H20
Private Const INTERNET_CONNECTION_CONFIGURED As Long = &H40

'如果是通过调制解调器的连接，则返回True
Public Function IsNetConnectViaModem() As Boolean
Dim dwFlags As Long
Call InternetGetConnectedState(dwFlags, 0&)
IsNetConnectViaModem = dwFlags And INTERNET_CONNECTION_MODEM
End Function