关于用WMI获取系统信息——编程实现(转)
关于用WMI获取系统信息——编程实现(转)[@more@] 一直以来都没有用过WMI, 都是用的PDH来获取系统信息.感觉两者很些相似,都是类似于性能数据库,基本的一些什么硬件软件信息都可以比较全面的获得.只是用VC来调用相对比较繁杂,用VB和C#就方便多了.这些天到MSDN上找了些资料,总算大致搞清了一些编程思路.对于那些很想知道怎么获取诸如CPUID,硬盘ID,BIOS信息以及主板信息的人来说应该有些帮助吧.试着用MSDN的例子乱写了一通,以下是通过WMI获取BIOS的例子,不对之处还请指正 ^_^: -------------------------------------------------------------------------------- #define _WIN32_DCOM #include using namespace std ; #include #include #include #pragma comment(lib, "Wbemuuid") int main(int argc,char**argv) { HRESULT hres ; // Initialize COM. hres=CoInitializeEx(0,COINIT_MULTITHREADED); if(FAILED(hres)) { cout<<"Failed to initialize COM library. Error code = 0x" < return 1 ; // Program has failed. } // Initialize hres=CoInitializeSecurity( NULL,-1,NULL,NULL,RPC_C_AUTHN_LEVEL_DEFAULT, RPC_C_IMP_LEVEL_IMPERSONATE,NULL,EOAC_NONE,NULL); if(FAILED(hres)) { cout<<"Failed to initialize security. Error code = 0x" < CoUninitialize(); return 1 ; // Program has failed. } // Obtain the initial locator to Windows Management on a particular host computer. IWbemLocator*pLoc=0 ; hres=CoCreateInstance(CLSID_WbemLocator,0,CLSCTX_INPROC_SERVER, IID_IWbemLocator,(LPVOID*)&pLoc); if(FAILED(hres)) { cout<<"Failed to create IWbemLocator object. Err code = 0x" < CoUninitialize(); return 1 ; // Program has failed. } IWbemServices*pSvc=0 ; // Connect to the rootcimv2 namespace with the current user and obtain pointer pSvc // to make IWbemServices calls. hres=pLoc->ConnectServer(_bstr_t(L"ROOTCIMV2"), NULL,NULL,0,NULL,0,0,&pSvc); if(FAILED(hres)) { cout<<"Could not connect. Error code = 0x" < pLoc->Release(); CoUninitialize(); return 1 ; // Program has failed. } cout<<"Connected to WMI"< // Set the IWbemServices proxy so that impersonation of the user (client) occurs. 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)) { cout<<"Could not set proxy blanket. Error code = 0x" < pSvc->Release(); pLoc->Release(); CoUninitialize(); return 1 ; // Program has failed. } // Use the IWbemServices pointer to make requests of WMI. // Make requests here: // For example, query for print queues that have more than 10 jobs IEnumWbemClassObject*pEnumerator=NULL ; hres=pSvc->ExecQuery( bstr_t("WQL"), bstr_t("SELECT * from Win32_BIOS"), WBEM_FLAG_FORWARD_ONLY|WBEM_FLAG_RETURN_IMMEDIATELY, NULL, &pEnumerator); if(FAILED(hres)) { cout<<"Query for print queues failed. Error code = 0x" < pSvc->Release(); pLoc->Release(); CoUninitialize(); return 1 ; // Program has failed. } else { IWbemClassObject*pInstance=NULL ; ULONG dwCount ; while(pEnumerator->Next( WBEM_INFINITE, 1, &pInstance, &dwCount)==S_OK) { SAFEARRAY*pvNames=NULL ; if(pInstance->GetNames(NULL,WBEM_FLAG_ALWAYS|WBEM_MASK_CONDITION_ORIGIN,NULL,&pvNames)==S_OK) { long vbl,vbu ; SafeArrayGetLBound(pvNames,1,&vbl); SafeArrayGetUBound(pvNames,1,&vbu); for(long idx=vbl;idx<=vbu;idx++) { long aidx=idx ; wchar_t *wsName=0 ; VARIANT vValue ; VariantInit(&vValue); SafeArrayGetElement(pvNames,&aidx,&wsName); BSTR bs=SysAllocString(wsName); hres=pInstance->Get(bs,0,&vValue,NULL,0); SysFreeString(bs); if(SUCCEEDED(hres)) { char szANSIString[MAX_PATH]; WideCharToMultiByte(CP_ACP,WC_COMPOSITECHECK,wsName,-1, szANSIString,sizeof(szANSIString),NULL,NULL); cout< switch(vValue.vt) { case VT_BSTR : wprintf(L"%s",V_BSTR(&vValue)); break ; case VT_I2 : wprintf(L"%d",V_I2(&vValue)); break ; case VT_I4 : wprintf(L"%d",V_I4(&vValue)); break ; case VT_BOOL : wprintf(L"%s",V_BOOL(&vValue)?L"TRUE":L"FALSE"); break ; default: /*WCHAR tmp[100]; wcscpy(tmp, V_BSTR(&vValue)); char tmp1[MAX_PATH]; WideCharToMultiByte(CP_ACP,WC_COMPOSITECHECK,tmp,-1, tmp1,sizeof(tmp1),NULL,NULL); cout< break; } cout< } SysFreeString(wsName); } } else { cout<<"Query for print queues failed. Error code = 0x" < pSvc->Release(); pLoc->Release(); CoUninitialize(); return 1 ; // Program has failed. } if(pvNames)SafeArrayDestroy(pvNames); } if(pInstance)pInstance->Release(); } // Cleanup // ======== pEnumerator->Release(); pSvc->Release(); pLoc->Release(); CoUninitialize(); return 0; // Program successfully completed. } //----------------------------------- 对于怎么用BCB编, 感觉还容易一点,因为我在类型转换的时候碰到了一些问题,而在BCB中的Variant类做了比较好的封装, 具体代码可以 http://www.cppfans.com上找到. void GetWmiInfo(TStrings *lpList, WideString wsClass) { IWbemLocator *pWbemLocator = NULL; if(CoCreateInstance(CLSID_WbemAdministrativeLocator, NULL, CLSCTX_INPROC_SERVER|CLSCTX_LOCAL_SERVER, IID_IUnknown, (void**)&pWbemLocator) == S_OK) { IWbemServices *pWbemServices = NULL; WideString wsNamespace = (L"rootcimv2"); if(pWbemLocator->ConnectServer(wsNamespace, NULL, NULL, NULL, 0, NULL, NULL, &pWbemServices) == S_OK) { IEnumWbemClassObject *pEnumClassObject = NULL; WideString wsWQL=L"WQL", wsQuery=WideString(L"Select * from ")+wsClass; if(pWbemServices->ExecQuery(wsWQL, wsQuery, WBEM_FLAG_RETURN_IMMEDIATELY,NULL, &pEnumClassObject) == S_OK) { IWbemClassObject *pClassObject = NULL; ULONG uCount = 1, uReturned; if(pEnumClassObject->Reset() == S_OK) { int iEnumIdx = 0; while(pEnumClassObject->Next(WBEM_INFINITE, uCount, &pClassObject, &uReturned) == S_OK) { lpList->Add("---------------- ["+IntToStr(iEnumIdx)+"] -----------------"); SAFEARRAY *pvNames = NULL; if(pClassObject->GetNames(NULL, WBEM_FLAG_ALWAYS | WBEM_MASK_CONDITION_ORIGIN, NULL, &pvNames) == S_OK) { long vbl, vbu; SafeArrayGetLBound(pvNames, 1, &vbl); SafeArrayGetUBound(pvNames, 1, &vbu); for(long idx=vbl; idx<=vbu; idx++) {
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