C++连接Wlan/Wifi网络设备_c++网络连接

本单元只介绍如何链接wifi设备，对信号强度不做涉及，另外链接指定wifi之前应该先判断wifi是否已经链接，如果已经链接就没必要再链接了，代码中采用的是没做链接判断，先直接断开然后重新进行链接，代码如下：

#include <wlanapi.h>
#pragma comment(lib, "wlanapi.lib")
BOOL connectWlan(CString Name, CString SSID, CString Password)
{
	BOOL bRet = FALSE;
	DWORD dwError = ERROR_SUCCESS;
	HANDLE hClient = NULL;
	DWORD dwServiceVersion;
	PWLAN_INTERFACE_INFO_LIST pIntfList = NULL;
 
	// 打开WLAN服务
	if ((dwError = WlanOpenHandle(
		WLAN_API_VERSION,
		NULL,
		&dwServiceVersion,
		&hClient
	)) == ERROR_SUCCESS) {
		//枚举处当前系统安装的所有无线网卡的接口信息
		if ((dwError = WlanEnumInterfaces(
			hClient,
			NULL,
			&pIntfList
		)) == ERROR_SUCCESS) {
			for (int i = 0; i < pIntfList->dwNumberOfItems; i++)
			{
				/*获取网卡信息*/
				PWLAN_INTERFACE_INFO pInterface = (PWLAN_INTERFACE_INFO)&pIntfList->InterfaceInfo[i];
 
				/*获得网络信息列表*/
				PWLAN_AVAILABLE_NETWORK_LIST pNetList = NULL;
				DWORD dwResult = WlanGetAvailableNetworkList(hClient
					, &pInterface->InterfaceGuidGUID
					, 0x00
					, NULL
					, &pNetList
				);
 
				if (ERROR_SUCCESS != dwResult)
				{
					if (pNetList != NULL)
					{
						WlanFreeMemory(pNetList);
						pNetList = NULL;
					}
 
					break;
				}
 
 
				/*连接网络*/
				for (int j = 0; j < pNetList->dwNumberOfItems; j++)
				{
					/*获取网络信息*/
					PWLAN_AVAILABLE_NETWORK pNet = (PWLAN_AVAILABLE_NETWORK)&pNetList->Network[j];
					if (strcmp(SSID, (char*)pNet->dot11Ssid.ucSSID))
						continue;
 
					if (pInterface->isState == wlan_interface_state_connected) {
// 判断wifi是否所需
						PWLAN_CONNECTION_ATTRIBUTES pConnectInfo = NULL;
						DWORD dwSize = sizeof(WLAN_CONNECTION_ATTRIBUTES);
						WLAN_O