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你可以调用IsNetworkAlive这个api函数来检查或者 实现System Event Notification Service的ISensNetwork接口。 接口那个应该在部件里面可以找的到。
IsNetworkAlive Function
The IsNetworkAlive function determines whether or not a local system is connected to a network, and identifies the type of network connection, for example, a LAN, WAN, or both.
Syntax
Bool IsNetworkAlive(
__outLPDWORD lpdwFlags
);
Parameters
lpdwFlags
The type of network connection that is available. This parameter can be one of the following values:
NETWORK_ALIVE_LAN
The computer has one or more LAN cards that are active.
NETWORK_ALIVE_WAN
The computer has one or more active RAS connections.
NETWORK_ALIVE_AOL
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Return Value
This function returnwhatsapp怎么用电脑登录s one ofwhatsapp客户端扫码进不去 the following values:
Return code Description
TRUE
A local system is connected to a network.
For information about the type of connection, see the lpdwFlags parameter.
FALSE
There is no connection.
For extended error information, call GetLastError.
Remarks
This function can be used by an application to determine whether or not there is network connectivity before proceeding with network operations. A directory service type of application, e-mail client, or Internet browser can adapt to various types of network connectivity. For example, a printing operation whatsapp网页版电脑版视频功能can be deferred until a network connection is available.whatsapp网页版聊天链接
It maywhatsapp网页版官网下载入口 not always be practical for an application to call IsNetworkAlive to determine whether or not a local system is disconnected from a LAN, because IsNet中国登陆whatsapp的方法workAlive can be swhatsapp加好友教程low, and it may take too much time for the function to detect that a local system is disconnected. However, IsNetworkAlive can always identify a WAN connectivity at the moment.
NoteThis funwhatsapp网页版无法短信验证ction is only available for TCP/IP connections.
Requirements
Client Requires Windows Vista, Windows XP, or Windows 2000 Professional.
Server Requires Windows Server 2008, Windows Server 2003, or Windows 2000 Server.
Header Declared in Sensapi.h.
Libwhatsapp引流打广告可以定位到女性吗rary Use Sensapi.lib.
DLL Requires Sensapi.dll.
不用api的,只要定时查看注册表就可以了,当网络联通时,系统会在注册表里写个值表示连通,否则会写另一个值表示不通,具体是那个地方忘了,你搜索一下就可以了。
代码连接最快#28``想用VB6 连接就慢了
请参考以下回答把,相信对你有用
你这个问题是出现在用wifi连接网络的时间吗?
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