＋设为首页 ＋添加到收藏夹
PB中怎样判断Internet连接状态及如何实现自动拨号？可以通过直接调用Windows本身的拨号程序拨号，只要不是手工从拨号网络连接就行了。
请最好提供源代码，多谢！
我的邮箱是：huaxiaosxl@163.com
给您抄段：http://www.programfan.com/showarticle.asp?id=1948
判断网络是否已经断线
【发表评论】 【保存文章】 【打印文章】
API函数定义
Dim eR As EIGCInternetConnectionState
Dim sMsg As String
Dim sName As String
Dim bConnected As Boolean
Private Declare Function InternetSetDialState Lib "wininet.dll" _
(ByVal lpszConnectoid As String, ByVal dwState As Long, _
ByVal dwReserved As Long) As Long
Private Declare Function InternetOpen Lib "wininet.dll" Alias "InternetOpenA" _
(ByVal sAgent As String, ByVal lAccessType As Long, ByVal sProxyName As String, _
ByVal sProxyBypass As String, ByVal lFlags As Long) As Long
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 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 Enum
InternetConnected 函数判断是否连接到Internet的函数
获得是否以及通过何中方式连接到Internet上
Private Function 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 Function
InternetConnected 函数的调用
检测是否已经以及使用什么方法连接到Internet
bConnected = InternetConnected(eR, sName)
根据获得的结果输出
If (eR And INTERNET_CONNECTION_MODEM) = INTERNET_CONNECTION_MODEM Then
sMsg = sMsg & "使用modem连接到Internet." & vbCrLf
End If
If (eR And INTERNET_CONNECTION_LAN) = INTERNET_CONNECTION_LAN Then
sMsg = sMsg & "使用内部网连接到Internet." & vbCrLf
End If
If (eR And INTERNET_CONNECTION_PROXY) = INTERNET_CONNECTION_PROXY Then
sMsg = sMsg & "通过代理服务器连接到Internet." & vbCrLf
End If
If (eR And INTERNET_CONNECTION_OFFLINE) = INTERNET_CONNECTION_OFFLINE Then
sMsg = sMsg & "现在连接处于离线状态." & vbCrLf
End If
If (eR And INTERNET_CONNECTION_CONFIGURED) = INTERNET_CONNECTION_CONFIGURED Then
sMsg = sMsg & "连接已经被设定." & vbCrLf
Else
sMsg = sMsg & "没有设定好的连接." & vbCrLf
End If
If (eR And INTERNET_RAS_INSTALLED) = INTERNET_RAS_INSTALLED Then
sMsg = sMsg & "本机已经安装了远程访问服务功能." & vbCrLf
End If
显示连接名称
If bConnected Then
sMsg = "已连接到Internet,连接名称: " & sName & vbCrLf & vbCrLf & sMsg
Else
sMsg = "没有连接到Internet,连接名称: " & sName & vbCrLf & vbCrLf & sMsg
End If
如果以上的回答，还没有解决你的问题，告诉我你的e_mail,我这里有一个ocx,很简单的解决你的问题
