public:
    CWiFiHelper()
    {
        TCHAR tzKey[MAX_PATH];
        CReg reg(HKEY_LOCAL_MACHINE, TEXT("Comm"));
        for (UINT i = 0; reg.EnumKey(i, tzKey) == S_OK; i++)
        {
            if (tzKey[UStrLen(tzKey) - 1] == '1')
            {
                CReg dev(reg, tzKey);
                TCHAR tzDisplayName[MAX_PATH];
                if (dev.GetStr(TEXT("DisplayName"), tzDisplayName))
                {
                    if (UStrStrI(tzDisplayName, TEXT("WiFi")) ||
                        UStrStrI(tzDisplayName, TEXT("Wi-Fi")) ||
                        UStrStrI(tzDisplayName, TEXT("Wireless")) ||
                        UStrStr(tzDisplayName, TEXT("802.11")))
                    {
                        UStrPrint(m_tzDevice, PMCLASS_NDIS_MINIPORT TEXT("\\%s"), tzKey);
                        //MessageBox(NULL, m_tzDevice, STR_AppName, MB_ICONINFORMATION);
                        return;
                    }
                }
            }
        }
        m_tzDevice[0] = 0;
    }

    BOOL IsEnabled()
    {
        CEDEVICE_POWER_STATE s = D4;
        if (m_tzDevice [0])
        {
            GetDevicePower(m_tzDevice, POWER_NAME, &s);
        }
        return s == D0;
    }

    HRESULT Enable(BOOL bEnable = TRUE)
    {
        if (m_tzDevice [0])
        {
            return SetDevicePower(m_tzDevice, POWER_NAME, bEnable ? D0 : D4);
        }
        else
        {
            return ERROR_DEVICE_NOT_AVAILABLE;
        }
    }
};

        for(DWORD i = 0; i < lineHandleCount; i++)
        {

            int rc;
            DWORD ver;
            LINEEXTENSIONID extensionID;

            if( lineNegotiateAPIVersion( lineApp, i, 0x00010000, 0x00020000, &ver, &extensionID ) == 0 )
            {
               rc = lineOpen( lineApp,i,&lineHandles[ i ],ver,0,(DWORD)0,LINECALLPRIVILEGE_MONITOR|LINECALLPRIVILEGE_OWNER,LINEMEDIAMODE_INTERACTIVEVOICE,NULL);
            }
        }
 }

２.编写回调函数，在这个函数里实现功能
VOID CALLBACK LineCallback(DWORD hDevice, DWORD dwMsg, DWORD dwCallbackInstance, DWORD dwParam1, DWORD dwParam2, DWORD dwParam3)
{
　//dwMsg是线路消息
   //dwParam1,dwParam2是具体的事件
}

3.当结束程序时，关闭线路
for ( DWORD i=0; i<lineHandleCount; i++ )
        lineClose( lineHandles[i]);

        delete[] lineHandles;
        lineShutdown( lineApp );