奇怪 用下面的例子编译不通过！ - C++ Builder / Windows SDK/API
① 初始化 COM 接口:访问 WMI, 必须先初始化 COM 接口, 在程式的一开始调用 CoInitialize(NULL); 初始化, 在结束时调用 CoUninitialize(); 释放资源。这两个函数在 #include <comdef.h> 里面定义。② 获取访问 WMI 权限:CoInitializeSecurity(NULL, -1, NULL, NULL, RPC_C_AUTHN_LEVEL_PKT, RPC_C_IMP_LEVEL_IMPERSONATE, NULL, EOAC_NONE, 0);假如这个函数返回 S_OK 获取权限成功, 否则为失败。③ 通过 IWbemLocator 和 IWbemServices 这两个 COM 接口访问 WMI, 获取系统信息:这个函数的参数: lpList 返回信息, wsClass 为要查找的系统信息类, 这些 COM 接口在 #include <wbemidl.h> 里定义。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"root\\cimv2");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 ){long aidx = idx;wchar_t *wsName = 0;VARIANT vValue;VariantInit(&vValue);SafeArrayGetElement(pvNames, &aidx, &wsName);BSTR bs = SysAllocString(wsName);HRESULT hRes = pClassObject->Get(bs, 0, &vValue, NULL, 0);SysFreeString(bs);if(hRes == S_OK){AnsiString s;Variant v = *(Variant*)&vValue;if(v.IsArray()){for(int i=v.ArrayLowBound(); i<=v.ArrayHighBound(); i ){Variant a = v.GetElement(i);if(!s.IsEmpty())s =", ";s =VarToStr(a);}}else{s = VarToStr(v);}lpList->Add(AnsiString(wsName) "=" s);}VariantClear(&vValue);SysFreeString(wsName);}}if(pvNames)SafeArrayDestroy(pvNames);iEnumIdx ;}}if(pClassObject)pClassObject->Release();}if(pEnumClassObject)pEnumClassObject->Release();}if(pWbemServices)pWbemServices->Release();}if(pWbemLocator)pWbemLocator->Release();}//---------------------------------------// 通过 WIN32_bios 获取 BIOS 信息:void __fastcall TForm1::Button1Click(TObject *Sender){Memo1->Lines->Add("================== [WIN32_bios] =================");GetWmiInfo(Memo1->Lines, "WIN32_bios");Memo1->Lines->Add("");}#include <Wbemidl.h>#pragma link "Wbemuuid.lib"//---------------------------------------__fastcall TForm1::TForm1(TComponent* Owner) : TForm(Owner){ CoInitialize(NULL);}//---------------------------------------void GetWmiInfo(TStrings *lpList, WideString wstrClass){ 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"root\\cimv2"); if(pWbemLocator->ConnectServer(wsNamespace, NULL, NULL, NULL, 0, NULL, NULL, &pWbemServices) == S_OK) { IEnumWbemClassObject *pEnumClassObject = NULL; WideString wstrWQL = L"WQL"; WideString wstrQuery = WideString(L"Select * from ") + wstrClass; if(pWbemServices->ExecQuery(wstrWQL, wstrQuery, WBEM_FLAG_RETURN_IMMEDIATELY, NULL, &pEnumClassObject) == S_OK) { IWbemClassObject *pClassObject = NULL; ULONG dwCount = 1, dwReturned; if(pEnumClassObject->Reset() == S_OK) { int nEnumIdx = 0; while(pEnumClassObject->Next(WBEM_INFINITE, dwCount, &pClassObject, &dwReturned) == S_OK) { lpList->Add("---------------- ["+IntToStr(nEnumIdx)+"] -----------------"); SAFEARRAY *pvNames = NULL; if(pClassObject->GetNames(NULL, WBEM_FLAG_ALWAYS | WBEM_MASK_CONDITION_ORIGIN, NULL, &pvNames) == S_OK) { long lArrayLowBound, lArrayUpperBound; SafeArrayGetLBound(pvNames, 1, &lArrayLowBound); SafeArrayGetUBound(pvNames, 1, &lArrayUpperBound); for(long lIndex=lArrayLowBound; lIndex<=lArrayUpperBound; lIndex++) { long lIndexTemp = lIndex; wchar_t *wstrName = 0; VARIANT vValue; VariantInit(&vValue); SafeArrayGetElement(pvNames, &lIndexTemp, &wstrName); BSTR bsz = SysAllocString(wstrName); HRESULT hRes = pClassObject->Get(bsz, 0, &vValue, NULL, 0); SysFreeString(bsz); if(hRes == S_OK) { AnsiString strTemp; Variant v = *(Variant*)&vValue; if(v.IsArray()) { for(int i=v.ArrayLowBound(); i<=v.ArrayHighBound(); i++) { Variant a = v.GetElement(i); if(!strTemp.IsEmpty()) strTemp += ", "; strTemp += VarToStr(a); } } else { strTemp = VarToStr(v); } lpList->Add(AnsiString(wstrName) + "=" + strTemp); } VariantClear(&vValue); SysFreeString(wstrName); } } if(pvNames) SafeArrayDestroy(pvNames); nEnumIdx++; } } if(pClassObject) pClassObject->Release(); } if(pEnumClassObject) pEnumClassObject->Release(); } if(pWbemServices) pWbemServices->Release(); } if(pWbemLocator) pWbemLocator->Release();}//---------------------------------------// 通过 WIN32_bios 获取 BIOS 信息:void __fastcall TForm1::Button1Click(TObject *Sender){ Memo1->Lines->Add("================== [WIN32_bios] ================="); GetWmiInfo(Memo1->Lines, "WIN32_bios"); Memo1->Lines->Add("");}//---------------------------------------void __fastcall TForm1::FormDestroy(TObject *Sender){ CoUninitialize();}