I am trying to deal with wmi, I use the last snippet from the article Calling a Provider Method. I can’t figure out how to specify ProcessStartupInformation for Win32_Process.Create on the example of this article and in general how to address the ProcessStartupInformation structure in this code?

#define _WIN32_DCOM #include <iostream> using namespace std; #include <comdef.h> #include <Wbemidl.h> #pragma comment(lib, "wbemuuid.lib") int main(int iArgCnt, char ** argv) { HRESULT hres; // Step 1: -------------------------------------------------- // Initialize COM. ------------------------------------------ hres = CoInitializeEx(0, COINIT_MULTITHREADED); if (FAILED(hres)) { cout << "Failed to initialize COM library. Error code = 0x" << hex << hres << endl; return 1; // Program has failed. } // Step 2: -------------------------------------------------- // Set general COM security levels -------------------------- hres = CoInitializeSecurity( NULL, -1, // COM negotiates service NULL, // Authentication services NULL, // Reserved RPC_C_AUTHN_LEVEL_DEFAULT, // Default authentication RPC_C_IMP_LEVEL_IMPERSONATE, // Default Impersonation NULL, // Authentication info EOAC_NONE, // Additional capabilities NULL // Reserved ); if (FAILED(hres)) { cout << "Failed to initialize security. Error code = 0x" << hex << hres << endl; CoUninitialize(); return 1; // Program has failed. } // Step 3: --------------------------------------------------- // Obtain the initial locator to WMI ------------------------- IWbemLocator *pLoc = NULL; hres = CoCreateInstance( CLSID_WbemLocator, 0, CLSCTX_INPROC_SERVER, IID_IWbemLocator, (LPVOID *) &pLoc); if (FAILED(hres)) { cout << "Failed to create IWbemLocator object. " << "Err code = 0x" << hex << hres << endl; CoUninitialize(); return 1; // Program has failed. } // Step 4: --------------------------------------------------- // Connect to WMI through the IWbemLocator::ConnectServer method IWbemServices *pSvc = NULL; // Connect to the local root\cimv2 namespace // and obtain pointer pSvc to make IWbemServices calls. hres = pLoc->ConnectServer( _bstr_t(L"ROOT\\CIMV2"), NULL, NULL, 0, NULL, 0, 0, &pSvc ); if (FAILED(hres)) { cout << "Could not connect. Error code = 0x" << hex << hres << endl; pLoc->Release(); CoUninitialize(); return 1; // Program has failed. } cout << "Connected to ROOT\\CIMV2 WMI namespace" << endl; // Step 5: -------------------------------------------------- // Set security levels for the proxy ------------------------ hres = CoSetProxyBlanket( pSvc, // Indicates the proxy to set RPC_C_AUTHN_WINNT, // RPC_C_AUTHN_xxx RPC_C_AUTHZ_NONE, // RPC_C_AUTHZ_xxx NULL, // Server principal name RPC_C_AUTHN_LEVEL_CALL, // RPC_C_AUTHN_LEVEL_xxx RPC_C_IMP_LEVEL_IMPERSONATE, // RPC_C_IMP_LEVEL_xxx NULL, // client identity EOAC_NONE // proxy capabilities ); if (FAILED(hres)) { cout << "Could not set proxy blanket. Error code = 0x" << hex << hres << endl; pSvc->Release(); pLoc->Release(); CoUninitialize(); return 1; // Program has failed. } // Step 6: -------------------------------------------------- // Use the IWbemServices pointer to make requests of WMI ---- // set up to call the Win32_Process::Create method BSTR MethodName = SysAllocString(L"Create"); BSTR ClassName = SysAllocString(L"Win32_Process"); IWbemClassObject* pClass = NULL; hres = pSvc->GetObject(ClassName, 0, NULL, &pClass, NULL); IWbemClassObject* pInParamsDefinition = NULL; hres = pClass->GetMethod(MethodName, 0, &pInParamsDefinition, NULL); IWbemClassObject* pClassInstance = NULL; hres = pInParamsDefinition->SpawnInstance(0, &pClassInstance); // Create the values for the in parameters VARIANT varCommand; varCommand.vt = VT_BSTR; varCommand.bstrVal = _bstr_t(L"notepad.exe"); // Store the value for the in parameters hres = pClassInstance->Put(L"CommandLine", 0, &varCommand, 0); wprintf(L"The command is: %s\n", V_BSTR(&varCommand)); // Execute Method IWbemClassObject* pOutParams = NULL; hres = pSvc->ExecMethod(ClassName, MethodName, 0, NULL, pClassInstance, &pOutParams, NULL); if (FAILED(hres)) { cout << "Could not execute method. Error code = 0x" << hex << hres << endl; VariantClear(&varCommand); SysFreeString(ClassName); SysFreeString(MethodName); pClass->Release(); pClassInstance->Release(); pInParamsDefinition->Release(); pOutParams->Release(); pSvc->Release(); pLoc->Release(); CoUninitialize(); return 1; // Program has failed. } // To see what the method returned, // use the following code. The return value will // be in &varReturnValue VARIANT varReturnValue; hres = pOutParams->Get(_bstr_t(L"ReturnValue"), 0, &varReturnValue, NULL, 0); // Clean up //-------------------------- VariantClear(&varCommand); VariantClear(&varReturnValue); SysFreeString(ClassName); SysFreeString(MethodName); pClass->Release(); pClassInstance->Release(); pInParamsDefinition->Release(); pOutParams->Release(); pLoc->Release(); pSvc->Release(); CoUninitialize(); return 0; }

    1 answer 1

    It seems to me that here, of the 4 arguments of the Create method , only the first one is indicated. And you still have to specify an instance of Win32_ProcessStartup as Win32_ProcessStartup

    example piece:

     //Query the Win32_ProcessStartup Class IWbemClassObject* pClass_ProcessStartup = NULL; hres = pSvc->GetObject(L"Win32_ProcessStartup", 0, NULL, &pClass_ProcessStartup, NULL); //Create a Instance of Win32_ProcessStartup IWbemClassObject* pClassInstance_ProcessStartup = NULL; hres = pClass_ProcessStartup->SpawnInstance(0, &pClassInstance_ProcessStartup); // Create a command to set WinstationDesktop value to empty //the process does not inherit the desktop and window station of its parent process VARIANT varCommand_WinstationDesktop; varCommand_WinstationDesktop.vt = VT_BSTR; varCommand_WinstationDesktop .bstrVal = L"ABC"; hres = pClassInstance_ProcessStartup->Put(L"WinstationDesktop",0,&varCommand_WinstationDesktop ,0); // Create a command to set ShowWindow value to SW_SHOWMAXIMIZED VARIANT varCommand_ShowWindow; varCommand_ShowWindow.vt = VT_UI1; varCommand_ShowWindow.bVal = SW_SHOWMAXIMIZED; hres = pClassInstance_ProcessStartup->Put(L"ShowWindow",0,&varCommand_ShowWindow,0); // Create a command to set ProcessStartupInformation to be the instance of Win32_ProcessStartup VARIANT varCommand_ProcessStartup; varCommand_ProcessStartup.vt = VT_UNKNOWN; varCommand_ProcessStartup.punkVal = pClassInstance_ProcessStartup; //set the value to the instance of Win32_Process process hres = pClassInstance->Put(L"ProcessStartupInformation", 0, &varCommand_ProcessStartup, 0);
    • Thanks for the answer, but I myself understand what needs to be done. The question is how to do it? - Alexey Manuilov
    • @ AlekseyManuilov Added an example - VTT
    • exactly what is needed. thank! - Alexey Manuilov