C++ builder 通过WMI方式修改DNS

#pragma hdrstop #include using namespace std; #include #pragma comment(lib, "wbemUuid2.lib") #pragma argsused void PrintWMIError(HRESULT hr); HRESULT modifyDNS() { HRESULT hr; hr = CoInitializeEx(0, COINIT_MULTITHREADED); hr = CoInitializeSecurity(NULL, -1, NULL, NULL, RPC_C_AUTHN_LEVEL_PKT_PRIVACY, RPC_C_IMP_LEVEL_IMPERSONATE, NULL, EOAC_SECURE_REFS, NULL); IWbemLocator *pLocator = NULL; IWbemServices *pNamespace = NULL; IWbemClassObject *pClass = NULL; IWbemClassObject *pInputParamClass = NULL; IWbemClassObject *pInputParamInstance = NULL; IWbemClassObject *pOutInst = NULL; BSTR InstancePath = SysAllocString( L"Win32_NetworkAdapterConfiguration.index='7'"); //index为网卡号 BSTR Path = SysAllocString(L"root\\cimv2"); BSTR ClassPath = SysAllocString(L"Win32_NetworkAdapterConfiguration"); BSTR MethodName1 = SysAllocString(L"SetDNSServerSearchOrder"); BSTR MethodName2 = SysAllocString(L"EnableDHCP"); LPCWSTR MethodName1ArgName = L"DNSServerSearchOrder"; BSTR dns1 = SysAllocString(L"10.0.0.22"); BSTR dns2 = SysAllocString(L"10.0.0.23"); long DnsIndex1[] = { 0 }; long DnsIndex2[] = { 1 }; SAFEARRAY *ip_list = SafeArrayCreateVector(VT_BSTR, 0, 2); SafeArrayPutElement(ip_list, DnsIndex1, dns1); SafeArrayPutElement(ip_list, DnsIndex2, dns2); VARIANT dns; dns.vt = VT_ARRAY | VT_BSTR; dns.parray = ip_list; hr = CoCreateInstance(CLSID_WbemLocator, 0, CLSCTX_INPROC_SERVER, IID_IWbemLocator, (void **) &pLocator); hr = pLocator->ConnectServer(Path, NULL, NULL, NULL, 0, NULL, NULL, &pNamespace); hr = CoSetProxyBlanket(pNamespace, RPC_C_AUTHN_WINNT, RPC_C_AUTHZ_NONE, NULL, RPC_C_AUTHN_LEVEL_CALL, RPC_C_IMP_LEVEL_IMPERSONATE, NULL, EOAC_NONE); if (!SUCCEEDED(hr)) { PrintWMIError(hr); return hr; } if (SUCCEEDED(hr)) hr = pNamespace->GetObject(ClassPath, 0, NULL, &pClass, NULL); if (!SUCCEEDED(hr)) { PrintWMIError(hr); return hr; } if (SUCCEEDED(hr)) hr = pClass->GetMethod(MethodName1, 0, &pInputParamClass, NULL); if (!SUCCEEDED(hr)) { PrintWMIError(hr); return hr; } if (SUCCEEDED(hr)) hr = pInputParamClass->SpawnInstance(0, &pInputParamInstance); if (!SUCCEEDED(hr)) { PrintWMIError(hr); return hr; } if (SUCCEEDED(hr)) { hr = pInputParamInstance->Put(MethodName1ArgName, 0, &dns, 0); } if (!SUCCEEDED(hr)) { PrintWMIError(hr); return hr; } if (SUCCEEDED(hr)) hr = pNamespace->ExecMethod(InstancePath, MethodName1, 0, NULL, pInputParamInstance, &pOutInst, NULL); if (!SUCCEEDED(hr)) { PrintWMIError(hr); return hr; } if (SUCCEEDED(hr)) hr = pNamespace->ExecMethod(InstancePath, MethodName2, 0, NULL, NULL, &pOutInst, NULL); if (!SUCCEEDED(hr)) { PrintWMIError(hr); return hr; } SysFreeString(InstancePath); SysFreeString(Path); SysFreeString(ClassPath); SysFreeString(MethodName1); SysFreeString(MethodName2); if (pOutInst) pOutInst->Release(); if (pInputParamInstance) pInputParamInstance->Release(); if (pInputParamClass) pInputParamClass->Release(); if (pClass) pClass->Release(); if (pNamespace) pNamespace->Release(); if (pLocator) pLocator->Release(); CoUninitialize(); return hr; } int main(int argc, char* argv[]) { modifyDNS(); } void PrintWMIError(HRESULT hr) { IWbemStatusCodeText * pStatus = NULL; HRESULT hres = CoCreateInstance(CLSID_WbemStatusCodeText, 0, CLSCTX_INPROC_SERVER, IID_IWbemStatusCodeText, (LPVOID *) &pStatus); if (S_OK == hres) { BSTR bstrError; hres = pStatus->GetErrorCodeText(hr, 0, 0, &bstrError); if (S_OK != hres) bstrError = SysAllocString(L"Get     last     error     failed"); BSTR bstrTError = bstrError; wchar_t* lpszError = bstrTError; printf("%s\n", lpszError); pStatus->Release(); SysFreeString(bstrError); } }