C++通用WMI接口实现获取Windows操作系统内核版本号

    作为一名Windows开发者，能熟练掌握WMI技术，在开发Windows应用程序的时候往往能够事半功倍。今天来给大家分享一个使用WMI来获取Windows操作系统内核版本号的例子。

    首先我们打开WMI测试器，连接ROOTCIMV2命名空间，输入WQL查询语句SELECT * FROM Win32_OperatingSystem，

    

    然后在查询的结果里我们找到Version属性，发现内核版本号为10.0.16299，即为我们所需要的结果。

    

    那么，这个结果如何在程序中被使用，如何用C++语言来实现呢？首先我们要包含comdef.h和Wbemidl.h头文件，然后调用wbemuuid.lib库帮助我们实现WMI的功能，代码及测试程序如下：

    

#include <iostream>
#include <Windows.h>
#include <stdlib.h>
#include <string>
#include <comdef.h>
#include <Wbemidl.h>
 
using namespace std;
 
#pragma comment(lib, "wbemuuid.lib")
 
int GetSystemVersion(char* pSystemVersion)
{
    HRESULT hres;
    hres = CoInitializeEx(0, COINIT_MULTITHREADED);
    if (FAILED(hres))
    {
        return -1;
    }
 
    hres = CoInitializeSecurity(NULL, -1, NULL, NULL, RPC_C_AUTHN_LEVEL_DEFAULT, RPC_C_IMP_LEVEL_IMPERSONATE, NULL, EOAC_NONE, NULL);
    if (FAILED(hres))
    {
        CoUninitialize();
        return -1;
    }
 
    IWbemLocator *pLoc = NULL;
    hres = CoCreateInstance(CLSID_WbemLocator, 0, CLSCTX_INPROC_SERVER, IID_IWbemLocator, (LPVOID *)&pLoc);
    if (FAILED(hres))
    {
        CoUninitialize();
        return -1;
    }
 
    IWbemServices *pSvc = NULL;
    hres = pLoc->ConnectServer(_bstr_t(L"ROOT\CIMV2"), NULL, NULL, 0, NULL, 0, 0, &pSvc);
    if (FAILED(hres))
    {
        pLoc->Release();
        CoUninitialize();
        return -1;
    }
 
    hres = CoSetProxyBlanket(pSvc, RPC_C_AUTHN_WINNT, RPC_C_AUTHZ_NONE, NULL, RPC_C_AUTHN_LEVEL_CALL, RPC_C_IMP_LEVEL_IMPERSONATE, NULL, EOAC_NONE);
    if (FAILED(hres))
    {
        pSvc->Release();
        pLoc->Release();
        CoUninitialize();
        return -1;
    }
 
    IEnumWbemClassObject* pEnumerator = NULL;
    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))
    {
        pSvc->Release();
        pLoc->Release();
        CoUninitialize();
        return -1;
    }
 
    IWbemClassObject *pclsObj = NULL;
    ULONG uReturn = 0;
    while (pEnumerator)
    {
        HRESULT hr = pEnumerator->Next(WBEM_INFINITE, 1, &pclsObj, &uReturn);
        if (0 == uReturn)
        {
            break;
        }
 
        VARIANT vtProp;
        hr = pclsObj->Get(L"Version", 0, &vtProp, 0, 0);
        WcharToChar(vtProp.bstrVal, pSystemVersion, 64);
        VariantClear(&vtProp);
        pclsObj->Release();
    }
    pSvc->Release();
    pLoc->Release();
    pEnumerator->Release();
    CoUninitialize();
 
    return 0;
}
 
int _tmain(int argc, _TCHAR* argv[])
{
    char pVersion[20];
    int retcode = 0;
    const char* s = "10.0.";
    char *p;
    retcode = GetSystemVersion(pVersion);
    if(retcode == 0)
    {
        p = strstr(pVersion,s);
        if(p!=NULL)
        {
            cout << "Current Windows is 2016 Server! " << endl;
            getchar();
            return 2;
        }
        else
        {
            cout << "Current Windows is not 2016 Server! " << endl;
            getchar();
            return 0;
        }
    }
    return 0;
}

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