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_badlm_LEVEL_badlmERSONATE, 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_badlm_LEVEL_badlmERSONATE, 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;}