c++中利用windows API获取电池电量和网络

电池电量

LPSYSTEM_POWER_STATUS power = new _SYSTEM_POWER_STATUS();
	int ret = GetSystemPowerStatus(power);
	int percent = (int)power->BatteryLifePercent;
	delete power;
	if (ret == 0) //表示获取失败
		return "0%";
	std::stringstream str;
	str << percent << "%";
	return str.str();

网络强度

DWORD dwError = ERROR_SUCCESS;
	DWORD dwNegotiatedVersion;
	HANDLE hClientHandle = NULL;

	dwError = WlanOpenHandle(WLAN_API_VERSION_1_0, NULL, &dwNegotiatedVersion, &hClientHandle);
	if (dwError != ERROR_SUCCESS)
		return 0;

	PWLAN_INTERFACE_INFO_LIST pInterfaceList = NULL;
	dwError = WlanEnumInterfaces(hClientHandle, NULL, &pInterfaceList);
	if (dwError != ERROR_SUCCESS)
	{
		WlanFreeMemory(pInterfaceList);
		return 0;
	}

	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 0;
	}
	if (pWLAN_AVAILABLE_NETWORK_LIST->dwNumberOfItems > 0)
	{
		wchar_t sz[256] = { 0 };
		WLAN_AVAILABLE_NETWORK wlanAN = pWLAN_AVAILABLE_NETWORK_LIST[0].Network[0];
		std::stringstream str;
		str<< (int)wlanAN.wlanSignalQuality;
		return str.str();  //信号质量，越大越好
	}
	else
		return "0";
	WlanFreeMemory(pInterfaceList);
	WlanFreeMemory(pWLAN_AVAILABLE_NETWORK_LIST);

做个记录，防止以遗忘