在C/C++中使用WMI(Windows Management Instrumentation)接口查询系统信息是一种强大的方法。下面是一个简单的例子,演示如何使用WMI查询系统信息,包括安装的软件信息、磁盘信息、网络适配器信息、操作系统信息等。请注意,这里使用的是COM接口,因此需要在代码中进行COM的初始化和反初始化。

#include #include #include #include #pragma comment(lib, "wbemuuid.lib")void QueryWMI(const wchar_t* query){    // 初始化COM    HRESULT hres = CoInitializeEx(0, COINIT_MULTITHREADED);    if (FAILED(hres))    {        std::wcerr << L"Failed to initialize COM library. Error code = 0x" << std::hex << hres << std::endl;        return;    }    // 初始化COM安全性    hres = CoInitializeSecurity(        nullptr, -1, nullptr, nullptr, RPC_C_AUTHN_LEVEL_DEFAULT, RPC_C_IMP_LEVEL_IMPERSONATE, nullptr, EOAC_NONE, nullptr);    if (FAILED(hres))    {        std::wcerr << L"Failed to initialize security. Error code = 0x" << std::hex << hres << std::endl;        CoUninitialize();        return;    }    // 创建WMI实例    IWbemLocator* pLoc = nullptr;    hres = CoCreateInstance(        CLSID_WbemLocator, 0, CLSCTX_INPROC_SERVER, IID_IWbemLocator, reinterpret_cast(&pLoc));    if (FAILED(hres))    {        std::wcerr << L"Failed to create IWbemLocator object. Error code = 0x" << std::hex << hres <ConnectServer(        _bstr_t(L"ROOT\\CIMV2"), nullptr, nullptr, 0, nullptr, 0, 0, &pSvc);    if (FAILED(hres))    {        std::wcerr << L"Failed to connect to ROOT\\CIMV2. Error code = 0x" << std::hex << hres <Release();        CoUninitialize();        return;    }    // 设置安全级别    hres = CoSetProxyBlanket(        pSvc, RPC_C_AUTHN_WINNT, RPC_C_AUTHZ_NONE, nullptr, RPC_C_AUTHN_LEVEL_CALL, RPC_C_IMP_LEVEL_IMPERSONATE, nullptr, EOAC_NONE);    if (FAILED(hres))    {        std::wcerr << L"Failed to set proxy blanket. Error code = 0x" << std::hex << hres <Release();        pLoc->Release();        CoUninitialize();        return;    }    // 执行WMI查询    IEnumWbemClassObject* pEnumerator = nullptr;    hres = pSvc->ExecQuery(        _bstr_t(L"WQL"), _bstr_t(query), WBEM_FLAG_FORWARD_ONLY | WBEM_FLAG_RETURN_IMMEDIATELY, nullptr, &pEnumerator);    if (FAILED(hres))    {        std::wcerr << L"Query for data failed. Error code = 0x" << std::hex << hres <Release();        pLoc->Release();        CoUninitialize();        return;    }    // 枚举查询结果    IWbemClassObject* pclsObj = nullptr;    ULONG uReturn = 0;    while (pEnumerator)    {        hres = pEnumerator->Next(WBEM_INFINITE, 1, &pclsObj, &uReturn);        if (uReturn == 0)            break;        VARIANT vtProp;        // 获取属性值        hres = pclsObj->Get(L"Name", 0, &vtProp, 0, 0);        if (SUCCEEDED(hres))        {            std::wcout << L"Name : " << vtProp.bstrVal <Release();    }    // 释放资源    pSvc->Release();    pLoc->Release();    pEnumerator->Release();    CoUninitialize();}int main(){    // 查询所有已安装的软件    QueryWMI(L"SELECT * FROM Win32_Product");    // 查询磁盘信息    QueryWMI(L"SELECT * FROM Win32_DiskDrive");    // 查询网络适配器信息    QueryWMI(L"SELECT * FROM Win32_NetworkAdapter");    // 查询操作系统信息    QueryWMI(L"SELECT * FROM Win32_OperatingSystem");    // 查询正在运行的进程信息    QueryWMI(L"SELECT * FROM Win32_Process");    // 查询所有用户账户信息    QueryWMI(L"SELECT * FROM Win32_UserAccount");    // 查询系统启动项信息    QueryWMI(L"SELECT * FROM Win32_StartupCommand");    // 查询物理内存信息    QueryWMI(L"SELECT * FROM Win32_PhysicalMemory");    return 0;}

这只是一个简单的例子,你可能需要根据自己的需求修改查询语句和处理结果的方式。此外,确保在使用WMI之前充分了解WMI的概念和相应的类。