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：https://www.jb51.net/article/81340.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：

// ControlWirelessCard.cpp : Defines the entry point for the console application. 
// 
  
#include "stdafx.h" 
#include <windows.h> 
#include <SetupAPI.h> 
#include <devguid.h> 
#include <string> 
#include <cfgmgr32.h> 
#include <wlanapi.h> 
#pragma comment(lib,"setupapi.lib") 
#pragma comment(lib, "wlanapi.lib") 
using namespace std; 
  
wstring getWirelessNetworkCardName() 
{ 
  wstring wirelessName; 
  HANDLE hClient = NULL; 
  DWORD dwMaxClient = 2;   //   
  DWORD dwCurVersion = 0; 
  DWORD dwResult = 0; 
  DWORD dwRetVal = 0; 
  int iRet = 0;   
  WCHAR GuidString[39] = {0}; 
  unsigned int i; 
  
  /* variables used for WlanEnumInterfaces */
  PWLAN_INTERFACE_INFO_LIST pIfList = NULL; 
  PWLAN_INTERFACE_INFO pIfInfo = NULL;   
     
  dwResult = WlanOpenHandle(dwMaxClient, NULL, &dwCurVersion, &hClient); 
  if (dwResult != ERROR_SUCCESS) { 
    wprintf(L"WlanOpenHandle failed with error: %u
", dwResult); 
    return wirelessName; 
  } 
  
  dwResult = WlanEnumInterfaces(hClient, NULL, &pIfList); 
  if (dwResult != ERROR_SUCCESS) { 
    wprintf(L"WlanEnumInterfaces failed with error: %u
", dwResult); 
    return wirelessName;     
  } else { 
    PWLAN_AVAILABLE_NETWORK_LIST pWLAN_AVAILABLE_NETWORK_LIST = NULL; 
    dwResult = WlanGetAvailableNetworkList(hClient, &pIfList->InterfaceInfo[0].InterfaceGuid, 
        WLAN_AVAILABLE_NETWORK_INCLUDE_ALL_MANUAL_HIDDEN_PROFILES, 
        NULL, &pWLAN_AVAILABLE_NETWORK_LIST); 
    if (dwResult != ERROR_SUCCESS) 
    {       
      printf("WlanGetAvailableNetworkList failed with error: %u
",dwResult); 
      WlanFreeMemory(pWLAN_AVAILABLE_NETWORK_LIST); 
      return wirelessName; 
    }     
  
    for (i = 0; i < (int) pIfList->dwNumberOfItems; i++) { 
      pIfInfo = (WLAN_INTERFACE_INFO *) &pIfList->InterfaceInfo[i]; 
      iRet = StringFromGUID2(pIfInfo->InterfaceGuid, (LPOLESTR) &GuidString,  
        sizeof(GuidString)/sizeof(*GuidString));  
    
      wirelessName = pIfInfo->strInterfaceDescription; 
    } 
  } 
  return wirelessName; 
} 
  
BOOL changeStatus(DWORD NewStatus, DWORD SelectedItem, HDEVINFO hDevInfo) 
{ 
  LPTSTR lpszMsg = NULL; 
  HCURSOR hCursor = NULL; 
  try
  { 
    SP_PROPCHANGE_PARAMS PropChangeParams = {sizeof(SP_CLASSINSTALL_HEADER)}; 
    SP_DEVINFO_DATA DeviceInfoData = {sizeof(SP_DEVINFO_DATA)};  
  
    hCursor = SetCursor(LoadCursor(NULL, IDC_WAIT)); 
    // Get a handle to the Selected Item. 
    if (!SetupDiEnumDeviceInfo(hDevInfo, SelectedItem, &DeviceInfoData)) 
    { 
      wprintf(L"SetupDiEnumDeviceInfo failed. %d
",GetLastError()); 
      throw lpszMsg; 
    } 
  
    // Set the PropChangeParams structure. 
    PropChangeParams.ClassInstallHeader.InstallFunction = DIF_PROPERTYCHANGE; 
    PropChangeParams.Scope = DICS_FLAG_GLOBAL; 
    PropChangeParams.StateChange = NewStatus; 
  
    if (!SetupDiSetClassInstallParams(hDevInfo, &DeviceInfoData, (SP_CLASSINSTALL_HEADER *)&PropChangeParams, 
    sizeof(PropChangeParams))) 
    { 
      wprintf(L"SetupDiSetClassInstallParams failed. %d
",GetLastError()); 
      throw lpszMsg; 
    } 
    // Call the ClassInstaller and perform the change. 
    if (!SetupDiCallClassInstaller(DIF_PROPERTYCHANGE,hDevInfo,&DeviceInfoData)) 
    { 
      wprintf(L"SetupDiCallClassInstaller failed. %d
",GetLastError()); 
      throw lpszMsg; 
    } 
    SetCursor(hCursor);  
    return TRUE; 
  } 
  catch (TCHAR * pszError) 
  { 
    SetCursor(hCursor); 
    if (NULL != lpszMsg) 
    { 
      LocalFree((HLOCAL)lpszMsg); 
    }  
    return FALSE; 
  }  
} 
  
int _tmain(int argc, _TCHAR* argv[]) 
{   
  LPTSTR lpszMsg = NULL; 
   try
   { 
     /* 
     TCHAR * GUIDString = NULL; 
     GUID guid; 
     ZeroMemory(&guid, sizeof(GUID)); 
     GUIDString = _T("4d36e972-e325-11ce-bfc1-08002be10318"); 
     UuidFromString((unsigned char *)GUIDString, &guid); 
     */
     //GUID guid = getWirelessNetworkCardGUID(); 
     HDEVINFO hDevInfo = SetupDiGetClassDevs(&GUID_DEVCLASS_NET,/*L"WIRELESS"*/NULL,NULL,DIGCF_PRESENT); 
     //HDEVINFO hDevInfo = SetupDiGetClassDevs(&guid,/*L"WIRELESS"*/NULL,NULL,DIGCF_PRESENT); 
     if (INVALID_HANDLE_VALUE == hDevInfo) 
     { 
      wprintf(L"INVALID_HANDLE_VALUE"); 
      return -1; 
     } 
  
     DWORD i; 
     int Icount=0; 
     SP_DEVINFO_DATA DeviceInfoData; 
     ZeroMemory(&DeviceInfoData, sizeof(SP_DEVINFO_DATA)); 
     DeviceInfoData.cbSize = sizeof(SP_DEVINFO_DATA); 
  
     for (i = 0; SetupDiEnumDeviceInfo(hDevInfo, i, &DeviceInfoData); ++i) 
     { 
       //Get DeviceInfo       
       LPTSTR buffer = NULL; 
       DWORD buffersize = 0; 
       DWORD Status, Problem;  
       BOOL bDisabled = FALSE;  
      while (!SetupDiGetDeviceRegistryProperty( 
          hDevInfo, 
          &DeviceInfoData, 
          SPDRP_DEVICEDESC, //Read the names of the designated card 
          NULL, 
          (PBYTE) buffer, 
          buffersize, 
          &buffersize) 
        ) 
       { 
         if ( GetLastError() == ERROR_INSUFFICIENT_BUFFER ) 
         {         
           if (buffer) LocalFree(buffer); 
          buffer=(LPTSTR)LocalAlloc(LPTR,buffersize);  
         } 
         else
         {  
          wprintf(L"read network card failed!"); 
         } 
       } 
  
       std::wstring strEthernet = buffer; 
       //wprintf(L"the buffer is %ws
",buffer); 
  
       wstring wirelessName = getWirelessNetworkCardName(); 
       if(wirelessName.empty()) 
       { 
         wprintf(L"wirelessName IS empty
"); 
         return -1; 
       } 
       //wprintf(L"wirelessName is %ws
",wirelessName); 
  
       if(wirelessName == buffer) 
       { 
         wprintf(L"Found the wireless card: %ws
",wirelessName); 
         if (int i= CM_Get_DevNode_Status(&Status, &Problem, DeviceInfoData.DevInst,0) != CR_SUCCESS)  
         {   
           wprintf(L"CM_Get_DevNode_Status failed. %d
",GetLastError()); 
          throw "failed
"; 
         } 
         if (!((Status & DN_HAS_PROBLEM) && (CM_PROB_DISABLED == Problem)))  
         {  
           bDisabled = FALSE; 
         }  
         if ((Status & DN_HAS_PROBLEM) && (CM_PROB_DISABLED == Problem))  
         {  
           bDisabled = TRUE;  
         }  
         if(bDisabled==FALSE) 
         {  
           wprintf(L"disable the network card
"); 
           changeStatus(DICS_DISABLE, i, hDevInfo);//disable 
         } 
         if(bDisabled==TRUE) 
         {  
           wprintf(L"enable the network card
"); 
           changeStatus(DICS_ENABLE, i, hDevInfo);// enable 
         } 
       }      
     } 
     return SetupDiDestroyDeviceInfoList(hDevInfo); 
   } 
   catch (TCHAR * pszError) 
   {   
     if (NULL != lpszMsg) 
     { 
      LocalFree((HLOCAL)lpszMsg); 
     }  
    return FALSE; 
   } 
  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-->Configuration Manager...-->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...> -->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。