Wininet.dll 应用系列

最新推荐文章于 2021-07-29 14:48:52 发布

whypp

最新推荐文章于 2021-07-29 14:48:52 发布

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文章标签： system internet network 网络 server

本文链接：https://blog.youkuaiyun.com/whypp/article/details/5340865

版权

查询网络状态

BOOL InternetGetConnectedState(
__out LPDWORD lpdwFlags,
__in DWORD dwReserved
);

第一个参数参考一下值:

INTERNET_CONNECTION_LAN 0x02	Local system uses a local area network to connect to the Internet.
INTERNET_CONNECTION_MODEM 0x01	Local system uses a modem to connect to the Internet.
INTERNET_CONNECTION_MODEM_BUSY 0x08	No longer used.
INTERNET_CONNECTION_OFFLINE 0x20	Local system is in offline mode.
INTERNET_CONNECTION_PROXY 0x04	Local system uses a proxy server to connect to the Internet.

第二个参数一直是零

例子1

DWORD flags;
int tries = 0;

while (InternetGetConnectedState(&flags,0) == FALSE) {
             tries++;
             Sleep(1000);
             if (tries >= 10) {
                return 1;

}

例子2

#include <windows.h>
#include <Wininet.h>
#pragma comment (lib,"Wininet")
int main(int argc, char* argv[])
{

DWORD flags=INTERNET_CONNECTION_LAN;
int tries = 0;

BOOL repare =InternetGetConnectedState(&flags,0);
if (!repare)
{
printf("no good");
}

return 0;
}

Wininet.h

Wininet.lib

Wininet.dll

用来检查网络连接使用