VC中实现用WMI获取设备信息

#include "stdafx.h"
#define _WIN32_DCOM
#include <iostream>
using namespace std;
#include <comdef.h>
#include <Wbemidl.h>
#include <conio.h>

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

BOOL ManageWMI();
int _tmain(int argc, _TCHAR* argv[])
{
    if(!ManageWMI()) printf("%WMI Error!");
_getch();
return 0;
}

BOOL ManageWMI()
{
    HRESULT hres;

    // Step 1: --------------------------------------------------
    // Initialize COM. ------------------------------------------

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

    // Step 2: --------------------------------------------------
    // Set general COM security levels --------------------------
    // Note: If you are using Windows 2000, you need to specify -
    // the default authentication credentials for a user by using
    // a SOLE_AUTHENTICATION_LIST structure in the pAuthList ----
    // parameter of CoInitializeSecurity ------------------------

    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.
    }
   
    // Step 3: ---------------------------------------------------
    // Obtain the initial locator to WMI -------------------------

    IWbemLocator *pLoc = NULL;

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

    if (FAILED(hres))
    {
        cout << "Failed to create IWbemLocator object."
            << " Err code = 0x"
            << hex << hres << endl;
        CoUninitialize();
        return 1;                 // Program has failed.
    }

    // Step 4: -----------------------------------------------------
    // Connect to WMI through the IWbemLocator::ConnectServer method

    IWbemServices *pSvc = NULL;

    // Connect to the root/cimv2 namespace with
    // the current user and obtain pointer pSvc
    // to make IWbemServices calls.
    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))
    {
        cout << "Could not connect. Error code = 0x"
             << hex << hres << endl;
        pLoc->Release();    
        CoUninitialize();
        return 1;                // Program has failed.
    }

    cout << "Connected to ROOT//CIMV2 WMI namespace" << endl;

    // Step 5: --------------------------------------------------
    // Set security levels on the proxy -------------------------

    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))
    {
        cout << "Could not set proxy blanket. Error code = 0x"
            << hex << hres << endl;
        pSvc->Release();
        pLoc->Release();    
        CoUninitialize();
        return 1;               // Program has failed.
    }

    // Step 6: --------------------------------------------------
    // Use the IWbemServices pointer to make requests of WMI ----

    // For example, get the name of the operating system
    IEnumWbemClassObject* pEnumerator = NULL;
    hres = pSvc->ExecQuery(
        bstr_t("WQL"),
        bstr_t("SELECT * FROM Win32_NetworkAdapterConfiguration WHERE IPEnabled = 'TRUE'"),
        WBEM_FLAG_FORWARD_ONLY | WBEM_FLAG_RETURN_IMMEDIATELY,
        NULL,
        &pEnumerator);
   
    if (FAILED(hres))
    {
        cout << "Query for Network Adapter Configuration failed."
            << " Error code = 0x"
            << hex << hres << endl;
        pSvc->Release();
        pLoc->Release();
        CoUninitialize();
        return 1;               // Program has failed.
    }

    // Step 7: -------------------------------------------------
    // Get the data from the query in step 6 -------------------

    IWbemClassObject *pclsObj;
    ULONG uReturn = 0;
  
    while (pEnumerator)
    {
        HRESULT hr = pEnumerator->Next(WBEM_INFINITE, 1,
            &pclsObj, &uReturn);

        if(0 == uReturn)
        {
            break;
        }

        VARIANT vtProp;
   VariantInit(&vtProp);

  
   //hr = pclsObj->Get(L"IPSubnet", 0, &vtProp, 0, 0);
        // Get the value of the Enable property
   hr = pclsObj->Get(L"IPEnabled", 0, &vtProp, 0, 0);
        // Get the value of the MacAddress property
   if(vtProp.boolVal)
   {
    hr = pclsObj->Get(L"MacAddress", 0, &vtProp, 0, 0);
    wcout << " MacAddress : " << vtProp.bstrVal << endl;
   }
  
   hr = pclsObj->Get(L"IPEnabled", 0, &vtProp, 0, 0);
   if(vtProp.boolVal)
   {
    LONG lstart, lend;
    LONG idx = -1;
    BSTR* pbstr;
    SAFEARRAY *sa;
    hr = pclsObj->Get(L"Description", 0, &vtProp, 0, 0);
    if(!FAILED(hr))
    {
     wcout << "Description: " << vtProp.bstrVal << endl;
    }
    hr = pclsObj->Get(L"DNSHostName", 0, &vtProp, 0, 0);
    if(!FAILED(hr))
    {
     cout << "DNS:" << vtProp.bstrVal << endl;
    }
    hr = pclsObj->Get(L"IPAddress", 0, &vtProp, 0, 0);
    if(!FAILED(hr))
    {  
     SAFEARRAY *psa = vtProp.parray;
     cout << "IP Address::" << psa << endl;
    }
   }

        VariantClear(&vtProp);
    }

    // Cleanup
    // ========
   
    pSvc->Release();
    pLoc->Release();
    pEnumerator->Release();
    pclsObj->Release();
    CoUninitialize();

    return 0;   // Program successfully completed.

}