WMI 编程之 Win32_OperatingSystem

#include <iostream>
#include <comdef.h>
#include <Wbemidl.h>

#include <atlbase.h>
#include <atlstr.h>

# pragma comment(lib, "wbemuuid.lib")
 

创建普通console 项目,添加 ATL 支持

 //
 // 初始化 COM
 //
 HRESULT hres;

 hres =  CoInitializeEx(0, COINIT_MULTITHREADED); 
 if (FAILED(hres))
 {
  return 1;                  // Program has failed.
 }

 hres =  CoInitializeSecurity( NULL,
  -1,                          // COM authentication
  NULL,                        // Authentication services
  NULL,                        // Reserved
  RPC_C_AUTHN_LEVEL_DEFAULT,   // Default authentication
  RPC_C_IMP_LEVEL_IMPERSONATE, // Default Impersonation 
  NULL,                        // Authentication info
  EOAC_NONE,                   // Additional capabilities
  NULL                         // Reserved
  );

 if (FAILED(hres))
 {
  cout << "Failed to initialize security. Error code = 0x"
   << hex << hres << endl;
  CoUninitialize();
  return 1;                    // Program has failed.
 }

 //
 // CoCreateInstance 创建 Locator 实例 .
 //
 CComQIPtr< IWbemLocator> pLoc;

 hres = CoCreateInstance(
    CLSID_WbemLocator,      
    0,
    CLSCTX_INPROC_SERVER,
    IID_IWbemLocator, (LPVOID *) &pLoc);

 if (FAILED(hres))
 {
  CoUninitialize();
  return 1;                 // Program has failed.
 }

 //
 // 连接到 "root/cimv2" 命名空间，获得 IWbemServices 类型的指针
 //
 CComQIPtr< IWbemServices >  pSvc;

 hres = pLoc->ConnectServer(
         _bstr_t(L"ROOT//CIMV2"), // Object path of WMI namespace
         NULL,                    // User name. NULL = current user
         NULL,                    // User password. NULL = current
         0,                       // Locale. NULL indicates current
         NULL,                    // Security flags.
         0,                       // Authority (e.g. Kerberos)
         0,                       // Context object
         &pSvc                    // pointer to IWbemServices proxy
         );
   
    if (FAILED(hres))
    {  
        CoUninitialize();
        return 1;                // Program has failed.
    }

 // 
 // 设置 IWbemServices 代理安全, 这样 WMI 服务相当于客户端使用
 //
 hres = CoSetProxyBlanket(
       pSvc,                        // Indicates the proxy to set
       RPC_C_AUTHN_WINNT,           // RPC_C_AUTHN_xxx
       RPC_C_AUTHZ_NONE,            // RPC_C_AUTHZ_xxx
       NULL,                        // Server principal name
       RPC_C_AUTHN_LEVEL_CALL,      // RPC_C_AUTHN_LEVEL_xxx
       RPC_C_IMP_LEVEL_IMPERSONATE, // RPC_C_IMP_LEVEL_xxx
       NULL,                        // client identity
       EOAC_NONE                    // proxy capabilities
    );

    if (FAILED(hres))
    {
        CoUninitialize();
        return 1;
    }

 // 
 // 使用 IWbemServices 指针请求 WMI, 得到有关操作系统的信息
 //
  CComQIPtr <IEnumWbemClassObject> pEnumerator ;

 hres = pSvc->ExecQuery(
        bstr_t("WQL"),
        bstr_t("SELECT * FROM Win32_OperatingSystem"),
        WBEM_FLAG_FORWARD_ONLY | WBEM_FLAG_RETURN_IMMEDIATELY,
        NULL,
        &pEnumerator);
   
    if (FAILED(hres))
 {
        CoUninitialize();
        return 1;               // Program has failed.
    }

 //
 // 显示WQL查询数据
 //
 
    ULONG uReturn = 0;

    while (pEnumerator)
    {

        CComQIPtr< IWbemClassObject > pclsObj ;
        HRESULT hr = pEnumerator->Next(WBEM_INFINITE, 1, &pclsObj, &uReturn);
        if(0 == uReturn)
        {
            break;
        }

        _variant_t vtProp;

  
  // 得到操作系统名字
        hr = pclsObj->Get(L"Name", 0, &vtProp, 0, 0 );
  // 得到系统启动分区
  pclsObj->Get(L"BootDevice", 0, &vtProp, 0, 0 ) ;
  // 得到当前运行的进程数
  pclsObj->Get(L"NumberOfProcesses", 0, &vtProp, 0, 0 );
  // 得到操作系统序列号
  pclsObj->Get(L"SerialNumber", 0, &vtProp, 0, 0 );
  // 得到操作系统的语言
  pclsObj->Get(L"OSLanguage", 0, &vtProp, 0, 0 );
  //
  // 由于这个属性是 read-only, 所以不能设置
  // vtProp.lVal = 0x0809;
  // pclsObj->Put( L"OSLanguage", 0/*reserved*/, &vtProp, VT_I4 );
  //
  // 得到制造商名称
  //
  pclsObj->Get(L"Manufacturer", 0, &vtProp, 0, 0 );
    }

 CoUninitialize();