在C++程序中开启和禁用Windows设备的无线网卡的方法

在C++程序中开启和禁用Windows设备的无线网卡的方法

原文链接地址：.htm

1.列出当前网卡：SetupDiEnumDeviceInfo
2.找出当前无线网卡的名字（用natvie wifi api）
3.卸载安装此驱动
问题：
log为：SetupDiSetClassInstallParams failed. -536870347
 
完整代码如下：

  1 // ControlWirelessCard.cpp : Defines the entry point for the console application. 
  2 // 
  3   
  4 #include "stdafx.h" 
  5 #include <windows.h> 
  6 #include <SetupAPI.h> 
  7 #include <devguid.h> 
  8 #include <string> 
  9 #include <cfgmgr32.h> 
 10 #include <wlanapi.h> 
 11 #pragma comment(lib,"setupapi.lib") 
 12 #pragma comment(lib, "wlanapi.lib") 
 13 using namespace std; 
 14   
 15 wstring getWirelessNetworkCardName() 
 16 { 
 17   wstring wirelessName; 
 18   HANDLE hClient = NULL; 
 19   DWORD dwMaxClient = 2;   //   
 20   DWORD dwCurVersion = 0; 
 21   DWORD dwResult = 0; 
 22   DWORD dwRetVal = 0; 
 23   int iRet = 0;   
 24   WCHAR GuidString[39] = {0}; 
 25   unsigned int i; 
 26   
 27   /* variables used for WlanEnumInterfaces */
 28   PWLAN_INTERFACE_INFO_LIST pIfList = NULL; 
 29   PWLAN_INTERFACE_INFO pIfInfo = NULL;   
 30      
 31   dwResult = WlanOpenHandle(dwMaxClient, NULL, &dwCurVersion, &hClient); 
 32   if (dwResult != ERROR_SUCCESS) { 
 33     wprintf(L"WlanOpenHandle failed with error: %un", dwResult); 
 34     return wirelessName; 
 35   } 
 36   
 37   dwResult = WlanEnumInterfaces(hClient, NULL, &pIfList); 
 38   if (dwResult != ERROR_SUCCESS) { 
 39     wprintf(L"WlanEnumInterfaces failed with error: %un", dwResult); 
 40     return wirelessName;     
 41   } else { 
 42     PWLAN_AVAILABLE_NETWORK_LIST pWLAN_AVAILABLE_NETWORK_LIST = NULL; 
 43     dwResult = WlanGetAvailableNetworkList(hClient, &pIfList->InterfaceInfo[0].InterfaceGuid, 
 44         WLAN_AVAILABLE_NETWORK_INCLUDE_ALL_MANUAL_HIDDEN_PROFILES, 
 45         NULL, &pWLAN_AVAILABLE_NETWORK_LIST); 
 46     if (dwResult != ERROR_SUCCESS) 
 47     {       
 48       printf("WlanGetAvailableNetworkList failed with error: %un",dwResult); 
 49       WlanFreeMemory(pWLAN_AVAILABLE_NETWORK_LIST); 
 50       return wirelessName; 
 51     }     
 52   
 53     for (i = 0; i < (int) pIfList->dwNumberOfItems; i++) { 
 54       pIfInfo = (WLAN_INTERFACE_INFO *) &pIfList->InterfaceInfo[i]; 
 55       iRet = StringFromGUID2(pIfInfo->InterfaceGuid, (LPOLESTR) &GuidString,  
 56         sizeof(GuidString)/sizeof(*GuidString));  
 57     
 58       wirelessName = pIfInfo->strInterfaceDescription; 
 59     } 
 60   } 
 61   return wirelessName; 
 62 } 
 63   
 64 BOOL changeStatus(DWORD NewStatus, DWORD SelectedItem, HDEVINFO hDevInfo) 
 65 { 
 66   LPTSTR lpszMsg = NULL; 
 67   HCURSOR hCursor = NULL; 
 68   try
 69   { 
 70     SP_PROPCHANGE_PARAMS PropChangeParams = {sizeof(SP_CLASSINSTALL_HEADER)}; 
 71     SP_DEVINFO_DATA DeviceInfoData = {sizeof(SP_DEVINFO_DATA)};  
 72   
 73     hCursor = SetCursor(LoadCursor(NULL, IDC_WAIT)); 
 74     // Get a handle to the Selected Item. 
 75     if (!SetupDiEnumDeviceInfo(hDevInfo, SelectedItem, &DeviceInfoData)) 
 76     { 
 77       wprintf(L"SetupDiEnumDeviceInfo failed. %dn",GetLastError()); 
 78       throw lpszMsg; 
 79     } 
 80   
 81     // Set the PropChangeParams structure. 
 82     PropChangeParams.ClassInstallHeader.InstallFunction = DIF_PROPERTYCHANGE; 
 83     PropChangeParams.Scope = DICS_FLAG_GLOBAL; 
 84     PropChangeParams.StateChange = NewStatus; 
 85   
 86     if (!SetupDiSetClassInstallParams(hDevInfo, &DeviceInfoData, (SP_CLASSINSTALL_HEADER *)&PropChangeParams, 
 87     sizeof(PropChangeParams))) 
 88     { 
 89       wprintf(L"SetupDiSetClassInstallParams failed. %dn",GetLastError()); 
 90       throw lpszMsg; 
 91     } 
 92     // Call the ClassInstaller and perform the change. 
 93     if (!SetupDiCallClassInstaller(DIF_PROPERTYCHANGE,hDevInfo,&DeviceInfoData)) 
 94     { 
 95       wprintf(L"SetupDiCallClassInstaller failed. %dn",GetLastError()); 
 96       throw lpszMsg; 
 97     } 
 98     SetCursor(hCursor);  
 99     return TRUE; 
100   } 
101   catch (TCHAR * pszError) 
102   { 
103     SetCursor(hCursor); 
104     if (NULL != lpszMsg) 
105     { 
106       LocalFree((HLOCAL)lpszMsg); 
107     }  
108     return FALSE; 
109   }  
110 } 
111   
112 int _tmain(int argc, _TCHAR* argv[]) 
113 {   
114   LPTSTR lpszMsg = NULL; 
115    try
116    { 
117      /* 
118      TCHAR * GUIDString = NULL; 
119      GUID guid; 
120      ZeroMemory(&guid, sizeof(GUID)); 
121      GUIDString = _T("4d36e972-e325-11ce-bfc1-08002be10318"); 
122      UuidFromString((unsigned char *)GUIDString, &guid); 
123      */
124      //GUID guid = getWirelessNetworkCardGUID(); 
125      HDEVINFO hDevInfo = SetupDiGetClassDevs(&GUID_DEVCLASS_NET,/*L"WIRELESS"*/NULL,NULL,DIGCF_PRESENT); 
126      //HDEVINFO hDevInfo = SetupDiGetClassDevs(&guid,/*L"WIRELESS"*/NULL,NULL,DIGCF_PRESENT); 
127      if (INVALID_HANDLE_VALUE == hDevInfo) 
128      { 
129       wprintf(L"INVALID_HANDLE_VALUE"); 
130       return -1; 
131      } 
132   
133      DWORD i; 
134      int Icount=0; 
135      SP_DEVINFO_DATA DeviceInfoData; 
136      ZeroMemory(&DeviceInfoData, sizeof(SP_DEVINFO_DATA)); 
137      DeviceInfoData.cbSize = sizeof(SP_DEVINFO_DATA); 
138   
139      for (i = 0; SetupDiEnumDeviceInfo(hDevInfo, i, &DeviceInfoData); ++i) 
140      { 
141        //Get DeviceInfo       
142        LPTSTR buffer = NULL; 
143        DWORD buffersize = 0; 
144        DWORD Status, Problem;  
145        BOOL bDisabled = FALSE;  
146       while (!SetupDiGetDeviceRegistryProperty( 
147           hDevInfo, 
148           &DeviceInfoData, 
149           SPDRP_DEVICEDESC, //Read the names of the designated card 
150           NULL, 
151           (PBYTE) buffer, 
152           buffersize, 
153           &buffersize) 
154         ) 
155        { 
156          if ( GetLastError() == ERROR_INSUFFICIENT_BUFFER ) 
157          {         
158            if (buffer) LocalFree(buffer); 
159           buffer=(LPTSTR)LocalAlloc(LPTR,buffersize);  
160          } 
161          else
162          {  
163           wprintf(L"read network card failed!"); 
164          } 
165        } 
166   
167        std::wstring strEthernet = buffer; 
168        //wprintf(L"the buffer is %wsn",buffer); 
169   
170        wstring wirelessName = getWirelessNetworkCardName(); 
171        pty()) 
172        { 
173          wprintf(L"wirelessName IS emptyn"); 
174          return -1; 
175        } 
176        //wprintf(L"wirelessName is %wsn",wirelessName); 
177   
178        if(wirelessName == buffer) 
179        { 
180          wprintf(L"Found the wireless card: %wsn",wirelessName); 
181          if (int i= CM_Get_DevNode_Status(&Status, &Problem, DeviceInfoData.DevInst,0) != CR_SUCCESS)  
182          {   
183            wprintf(L"CM_Get_DevNode_Status failed. %dn",GetLastError()); 
184           throw "failedn"; 
185          } 
186          if (!((Status & DN_HAS_PROBLEM) && (CM_PROB_DISABLED == Problem)))  
187          {  
188            bDisabled = FALSE; 
189          }  
190          if ((Status & DN_HAS_PROBLEM) && (CM_PROB_DISABLED == Problem))  
191          {  
192            bDisabled = TRUE;  
193          }  
194          if(bDisabled==FALSE) 
195          {  
196            wprintf(L"disable the network cardn"); 
197            changeStatus(DICS_DISABLE, i, hDevInfo);//disable 
198          } 
199          if(bDisabled==TRUE) 
200          {  
201            wprintf(L"enable the network cardn"); 
202            changeStatus(DICS_ENABLE, i, hDevInfo);// enable 
203          } 
204        }      
205      } 
206      return SetupDiDestroyDeviceInfoList(hDevInfo); 
207    } 
208    catch (TCHAR * pszError) 
209    {   
210      if (NULL != lpszMsg) 
211      { 
212       LocalFree((HLOCAL)lpszMsg); 
213      }  
214     return FALSE; 
215    } 
216   return 0; 

一些常见错误解决
一、
从错误返回值入手。
-536870347，用windows自带计算器，选择程序员模式，将此十进制转换为16进制为E0000235.
用此错误号搜索，就是大名鼎鼎的32位程序跑在64位系统中报错。
虽然我用的64位win8下VS编译的程序，但是编译选项中仍然是WIN32程序。那么我们只需要修改成x64编译即可，操作如下。
BUILD-->-->找到要修改的project，将platform选择为x64.
如果没有，说明没有添加x64编译项，接着上面，在platform中选择&> -->New platform下选x64-->OK.
二、
编译64位程序，运行之。
仍然报错，返回值是5.ACCESS_DENIED.
权限不够，我们需要申请高权限。如下申请Admin权限：
你项目的Properties-->Linker-->Manifest File-->UAC Execution Level选requireAdministrator。
三、
继续运行。卸载无线网卡驱动成功。
但是上一篇的程序仍然有个问题，由于驱动卸载了，就不能用wlan api得到无线网卡名称，
所以程序加载无线网卡驱动就会失败。
我们可以用关键字“Wireless Network Adapter”来查找无线网卡，省掉使用wlan api那一步。

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