怎么获取无线网络信号强度

如何获取无线网络信号强度。
获取上网本WIFI的信号强度，知道的给点源码参考一下。。谢谢

[解决办法]
利用 RConnectionMonitor 类。

C/C++ code

  //connect   RConnectionMonitor monitor;   monitor.ConnectL();   CleanupClosePushL(monitor);   TRequestStatus status;   TInt iSignalStrength;   //get all wifi packets   TPckgBuf<TConnMonNetworkNames> pkgNetworks;   monitor.GetPckgAttribute(EBearerIdWLAN, 0, KNetworkNames, pkgNetworks, status);   User::WaitForRequest(status);   TInt packetCount = pkgNetworks().Count();    //find ssid in packets   TBuf16<36> ssid16;   ssid16.Copy(pkgNetworks().iNetwork[0].iName);　//get signal strength   iSignalStrength = (TInt) pkgNetworks().iNetwork[0].iSignalStrength;
[解决办法]
关键时候, 还是我来吧!

M$已经提供了相应的wlanapi, 在2009/2010中直接使用就行了:
C/C++ code
void __fastcall TForm1::Button1Click(TObject *Sender){    DWORD dwError = ERROR_SUCCESS;    DWORD dwNegotiatedVersion;    HANDLE hClientHandle = NULL;    dwError = WlanOpenHandle(WLAN_API_VERSION_1_0, NULL, &dwNegotiatedVersion, &hClientHandle);    if (dwError != ERROR_SUCCESS)        return;    PWLAN_INTERFACE_INFO_LIST pInterfaceList = NULL;    dwError = WlanEnumInterfaces(hClientHandle, NULL,&pInterfaceList);    if ( dwError != ERROR_SUCCESS )    {        WlanFreeMemory(pInterfaceList);        return;    }    GUID &guid = pInterfaceList->InterfaceInfo[0].InterfaceGuid;    PWLAN_AVAILABLE_NETWORK_LIST pWLAN_AVAILABLE_NETWORK_LIST = NULL;    dwError = WlanGetAvailableNetworkList(hClientHandle, &guid,            WLAN_AVAILABLE_NETWORK_INCLUDE_ALL_MANUAL_HIDDEN_PROFILES,            NULL, &pWLAN_AVAILABLE_NETWORK_LIST);    if (dwError != ERROR_SUCCESS)    {        WlanFreeMemory(pInterfaceList);        WlanFreeMemory(pWLAN_AVAILABLE_NETWORK_LIST);        return;    }    if (pWLAN_AVAILABLE_NETWORK_LIST->dwNumberOfItems > 0)    {        wchar_t sz[256] = { 0 };        WLAN_AVAILABLE_NETWORK wlanAN = pWLAN_AVAILABLE_NETWORK_LIST[0].Network[0];        wsprintfW(sz, L"%s:%d", wlanAN.strProfileName, wlanAN.wlanSignalQuality);        Memo1->Lines->Add(sz);    }    WlanFreeMemory(pInterfaceList);    WlanFreeMemory(pWLAN_AVAILABLE_NETWORK_LIST);}