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The WMI Delphi Code Creator now can create C++ Code compatible with Borland/Embarcadero compilers

After a lots of tests, I can officially announce which the WMI Delphi Code Creator now can create C++ Code compatible with the Borland/Embarcadero compilers. This new feature will be very helpful for developers using Borland/Embarcadero C++ compilers because exist very few documentation  about accessing the WMI from these compilers. The generated code can be compiled without any changes using the very old C++ Builder 5 until the modern C++ Builder XE2. The generated code uses the wbemcli.h library which is included in all the versions of  C++ builder. Another feature of this release is which the generated C++ code include all the security settings needed to establish local and remote WMI connections.

As always all your suggestions and comments are very welcome.

You can download the application from the  WMI Delphi Code Creator page.

C++ Code generated for the tool to access a WMI Class

#pragma hdrstop
#include <iostream>
using namespace std;
#include <wbemcli.h>
#include <comdef.h> 

//CREDENTIAL structure
//http://msdn.microsoft.com/en-us/library/windows/desktop/aa374788%28v=vs.85%29.aspx
#define CRED_MAX_USERNAME_LENGTH            513
#define CRED_MAX_CREDENTIAL_BLOB_SIZE       512
#define CREDUI_MAX_USERNAME_LENGTH CRED_MAX_USERNAME_LENGTH
#define CREDUI_MAX_PASSWORD_LENGTH (CRED_MAX_CREDENTIAL_BLOB_SIZE / 2)

// The Win32_Process class represents a sequence of events on a Win32 system. Any sequence consisting of the interaction of one or more processors or interpreters, some executable code, and a set of inputs, is a descendent (or member) of this class.
// Example: A client application running on a Win32 system.

#pragma argsused
int main(int argc, char* argv[])
{
	wchar_t pszName[CREDUI_MAX_USERNAME_LENGTH+1] = L"user";
	wchar_t pszPwd[CREDUI_MAX_PASSWORD_LENGTH+1]  = L"password";
	BSTR strNetworkResource;
	//To use a WMI remote connection set localconn to false and configure the values of the pszName, pszPwd and the name of the remote machine in strNetworkResource
	bool localconn = true;	
	strNetworkResource = localconn ?  L"\\\\.\\root\\CIMV2" : L"\\\\remote--machine\\root\\CIMV2";

	COAUTHIDENTITY *userAcct =  NULL ;
	COAUTHIDENTITY authIdent;

	// Initialize COM. ------------------------------------------

	HRESULT hres;
	hres =  CoInitializeEx(0, COINIT_MULTITHREADED);
	if (FAILED(hres))
	{
        cout << "Failed to initialize COM library. Error code = 0x"	<< hex << hres << endl;
        cout << _com_error(hres).ErrorMessage() << endl;
        cout << "press enter to exit" << endl;
        cin.get();		
        return 1;                  // Program has failed.
	}

	// Set general COM security levels --------------------------

	if (localconn)
		hres =  CoInitializeSecurity(
			NULL,
			-1,                          // COM authentication
			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
			);
	else
		hres =  CoInitializeSecurity(
			NULL,
			-1,                          // COM authentication
			NULL,                        // Authentication services
			NULL,                        // Reserved
			RPC_C_AUTHN_LEVEL_DEFAULT,   // Default authentication
			RPC_C_IMP_LEVEL_IDENTIFY,    // 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;
        cout << _com_error(hres).ErrorMessage() << endl;
        CoUninitialize();
		cout << "press enter to exit" << endl;
	    cin.get();		
        return 1;                    // Program has failed.
	}

	// 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;
        cout << _com_error(hres).ErrorMessage() << endl;
        CoUninitialize();	    
        cout << "press enter to exit" << endl;
		cin.get();		
        return 1;                 // Program has failed.
	}

	// Connect to WMI through the IWbemLocator::ConnectServer method

	IWbemServices *pSvc = NULL;

	if (localconn)	
		hres = pLoc->ConnectServer(
			 strNetworkResource,      // Object path of WMI namespace
			 NULL,                    // User name. NULL = current user
			 NULL,                    // User password. NULL = current
			 0,                       // Locale. NULL indicates current
			 NULL,                    // Security flags.
			 0,                       // Authority (e.g. Kerberos)
			 0,                       // Context object
			 &pSvc                    // pointer to IWbemServices proxy
			 );
	else
		hres = pLoc->ConnectServer(
			strNetworkResource,  // Object path of WMI namespace
			pszName,             // User name
			pszPwd,              // User password
			NULL,                // Locale
			NULL,                // Security flags
			NULL,				 // Authority
			NULL,                // Context object
			&pSvc                // IWbemServices proxy
			);

	if (FAILED(hres))
	{
        cout << "Could not connect. Error code = 0x" << hex << hres << endl;	
        cout << _com_error(hres).ErrorMessage() << endl;
        pLoc->Release();
        CoUninitialize();
	    cout << "press enter to exit" << endl;
	    cin.get();			
        return 1;                // Program has failed.
	}

	cout << "Connected to root\\CIMV2 WMI namespace" << endl;

    // Set security levels on the proxy -------------------------
	if (localconn)
		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
		);
	else
	{
		// Create COAUTHIDENTITY that can be used for setting security on proxy
		memset(&authIdent, 0, sizeof(COAUTHIDENTITY));
		authIdent.PasswordLength = wcslen (pszPwd);
		authIdent.Password = (USHORT*)pszPwd;
		authIdent.User = (USHORT*)pszName;
		authIdent.UserLength = wcslen(pszName);
		authIdent.Domain = 0;
		authIdent.DomainLength = 0;
		authIdent.Flags = SEC_WINNT_AUTH_IDENTITY_UNICODE;
		userAcct = &authIdent;

		hres = CoSetProxyBlanket(
		   pSvc,                           // Indicates the proxy to set
		   RPC_C_AUTHN_DEFAULT,            // RPC_C_AUTHN_xxx
		   RPC_C_AUTHZ_DEFAULT,            // RPC_C_AUTHZ_xxx
		   COLE_DEFAULT_PRINCIPAL,         // Server principal name
		   RPC_C_AUTHN_LEVEL_PKT_PRIVACY,  // RPC_C_AUTHN_LEVEL_xxx
		   RPC_C_IMP_LEVEL_IMPERSONATE,    // RPC_C_IMP_LEVEL_xxx
		   userAcct,                       // client identity
		   EOAC_NONE                       // proxy capabilities
		);
	}

	if (FAILED(hres))
	{
        cout << "Could not set proxy blanket. Error code = 0x" << hex << hres << endl;
		cout << _com_error(hres).ErrorMessage() << endl;
		pSvc->Release();
		pLoc->Release();
		CoUninitialize();
		cout << "press enter to exit" << endl;
		cin.get();		
		return 1;               // Program has failed.
	}

	// Use the IWbemServices pointer to make requests of WMI ----

	IEnumWbemClassObject* pEnumerator = NULL;
	hres = pSvc->ExecQuery(	L"WQL",	L"SELECT * FROM Win32_Process",
	WBEM_FLAG_FORWARD_ONLY | WBEM_FLAG_RETURN_IMMEDIATELY, NULL, &pEnumerator);

	if (FAILED(hres))
	{
		cout << "ExecQuery failed" << " Error code = 0x"	<< hex << hres << endl;
		cout << _com_error(hres).ErrorMessage() << endl;
		pSvc->Release();
		pLoc->Release();
		CoUninitialize();
		cout << "press enter to exit" << endl;
		cin.get();		
		return 1;               // Program has failed.
	}
    
	// Secure the enumerator proxy
	if (!localconn)
	{
		
		hres = CoSetProxyBlanket(
			pEnumerator,                    // Indicates the proxy to set
			RPC_C_AUTHN_DEFAULT,            // RPC_C_AUTHN_xxx
			RPC_C_AUTHZ_DEFAULT,            // RPC_C_AUTHZ_xxx
			COLE_DEFAULT_PRINCIPAL,         // Server principal name
			RPC_C_AUTHN_LEVEL_PKT_PRIVACY,  // RPC_C_AUTHN_LEVEL_xxx
			RPC_C_IMP_LEVEL_IMPERSONATE,    // RPC_C_IMP_LEVEL_xxx
			userAcct,                       // client identity
			EOAC_NONE                       // proxy capabilities
			);

		if (FAILED(hres))
		{
			cout << "Could not set proxy blanket on enumerator. Error code = 0x" << hex << hres << endl;
			cout << _com_error(hres).ErrorMessage() << endl;
			pEnumerator->Release();
			pSvc->Release();
			pLoc->Release();
			CoUninitialize();
			cout << "press enter to exit" << endl;
			cin.get();				
			return 1;               // Program has failed.
		}
	}

	// Get the data from the WQL sentence
	IWbemClassObject *pclsObj = NULL;
	ULONG uReturn = 0;

	while (pEnumerator)
	{
		HRESULT hr = pEnumerator->Next(WBEM_INFINITE, 1, &pclsObj, &uReturn);

		if(0 == uReturn || FAILED(hr))
		  break;

		VARIANT vtProp;

                hr = pclsObj->Get(L"Name", 0, &vtProp, 0, 0);// String
                if (!FAILED(hr))
                {
                  if ((vtProp.vt==VT_NULL) || (vtProp.vt==VT_EMPTY))
                    wcout << "Name : " << ((vtProp.vt==VT_NULL) ? "NULL" : "EMPTY") << endl;
                  else
                  if ((vtProp.vt & VT_ARRAY))
                    wcout << "Name : " << "Array types not supported (yet)" << endl;
                  else
                    wcout << "Name : " << vtProp.bstrVal << endl;
                }
                VariantClear(&vtProp);

                hr = pclsObj->Get(L"ProcessId", 0, &vtProp, 0, 0);// Uint32
                if (!FAILED(hr))
                {
                  if ((vtProp.vt==VT_NULL) || (vtProp.vt==VT_EMPTY))
                    wcout << "ProcessId : " << ((vtProp.vt==VT_NULL) ? "NULL" : "EMPTY") << endl;
                  else
                  if ((vtProp.vt & VT_ARRAY))
                    wcout << "ProcessId : " << "Array types not supported (yet)" << endl;
                  else
                    wcout << "ProcessId : " << vtProp.uintVal << endl;
                }
                VariantClear(&vtProp);

		
		pclsObj->Release();
		pclsObj=NULL;
	}

	// Cleanup

	pSvc->Release();
	pLoc->Release();
	pEnumerator->Release();
	if (pclsObj!=NULL)
	 pclsObj->Release();

	CoUninitialize();
	cout << "press enter to exit" << endl;
	cin.get();
	return 0;   // Program successfully completed.
}

C++ Code generated for the tool to execute a WMI Method

#pragma hdrstop
#include <iostream>
using namespace std;
#include <wbemcli.h>
#include <comdef.h>

//CREDENTIAL structure
//http://msdn.microsoft.com/en-us/library/windows/desktop/aa374788%28v=vs.85%29.aspx
#define CRED_MAX_USERNAME_LENGTH            513
#define CRED_MAX_CREDENTIAL_BLOB_SIZE       512
#define CREDUI_MAX_USERNAME_LENGTH CRED_MAX_USERNAME_LENGTH
#define CREDUI_MAX_PASSWORD_LENGTH (CRED_MAX_CREDENTIAL_BLOB_SIZE / 2)

// The Create method creates a new process. 
// The method returns an integer value that can be interpretted as follows: 
// 0 - Successful completion.
// 2 - The user does not have access to the requested information.
// 3 - The user does not have sufficient privilge.
// 8 - Unknown failure.
// 9 - The path specified does not exist.
// 21 - The specified parameter is invalid.
// Other - For integer values other than those listed above, refer to Win32 error code documentation.

#pragma argsused
int main(int argc, char* argv[])
{
	wchar_t pszName[CREDUI_MAX_USERNAME_LENGTH+1] = L"user";
	wchar_t pszPwd[CREDUI_MAX_PASSWORD_LENGTH+1]  = L"password";
	BSTR strNetworkResource;
	//To use a WMI remote connection set localconn to false and configure the values of the pszName, pszPwd and the name of the remote machine in strNetworkResource
	bool localconn = true;	
	strNetworkResource = localconn ?  L"\\\\.\\root\\CIMV2" : L"\\\\remote--machine\\root\\CIMV2";

	COAUTHIDENTITY *userAcct =  NULL ;
	COAUTHIDENTITY authIdent;
	
	HRESULT hres;

	// Initialize COM. ------------------------------------------

	hres =  CoInitializeEx(0, COINIT_MULTITHREADED);
	if (FAILED(hres))
	{
		cout << "Failed to initialize COM library. Error code = 0x" << hex << hres << endl;
		cout << _com_error(hres).ErrorMessage() << endl;
		cout << "press enter to exit" << endl;
		cin.get();			
		return 1;                  // Program has failed.
	}

	// Set general COM security levels --------------------------

	if (localconn)
		hres =  CoInitializeSecurity(
			NULL,
			-1,                          // COM authentication
			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
			);
	else
		hres =  CoInitializeSecurity(
			NULL,
			-1,                          // COM authentication
			NULL,                        // Authentication services
			NULL,                        // Reserved
			RPC_C_AUTHN_LEVEL_DEFAULT,   // Default authentication
			RPC_C_IMP_LEVEL_IDENTIFY,    // 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;
		cout << _com_error(hres).ErrorMessage() << endl;
		CoUninitialize();
		cout << "press enter to exit" << endl;
		cin.get();			
		return 1;                      // Program has failed.
	}
    
    // 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;
		cout << _com_error(hres).ErrorMessage() << endl;
		CoUninitialize();
		cout << "press enter to exit" << endl;
		cin.get();				
		return 1;                 // Program has failed.
	}

    // Connect to WMI through the IWbemLocator::ConnectServer method

    IWbemServices *pSvc = NULL;
	
    // Connect to the root\\CIMV2 namespace
    // and obtain pointer pSvc to make IWbemServices calls.
	if (localconn)	
		hres = pLoc->ConnectServer(
			 strNetworkResource,      // Object path of WMI namespace
			 NULL,                    // User name. NULL = current user
			 NULL,                    // User password. NULL = current
			 0,                       // Locale. NULL indicates current
			 NULL,                    // Security flags.
			 0,                       // Authority (e.g. Kerberos)
			 0,                       // Context object
			 &pSvc                    // pointer to IWbemServices proxy
			 );
	else
		hres = pLoc->ConnectServer(
			strNetworkResource,  // Object path of WMI namespace
			pszName,             // User name
			pszPwd,              // User password
			NULL,                // Locale
			NULL,                // Security flags
			NULL,				 // Authority
			NULL,                // Context object
			&pSvc                // IWbemServices proxy
			);
			
			
	if (FAILED(hres))
	{
		cout << "Could not connect. Error code = 0x" << hex << hres << endl;
		cout << _com_error(hres).ErrorMessage() << endl;
		pLoc->Release();
		CoUninitialize();
		cout << "press enter to exit" << endl;
		cin.get();					
		return 1;                // Program has failed.
	}

	cout << "Connected to root\\CIMV2 WMI namespace" << endl;

    // Set security levels on the proxy -------------------------
	if (localconn)
		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
		);
	else
	{
		// Create COAUTHIDENTITY that can be used for setting security on proxy
		memset(&authIdent, 0, sizeof(COAUTHIDENTITY));
		authIdent.PasswordLength = wcslen (pszPwd);
		authIdent.Password = (USHORT*)pszPwd;
		authIdent.User = (USHORT*)pszName;
		authIdent.UserLength = wcslen(pszName);
		authIdent.Domain = 0;
		authIdent.DomainLength = 0;
		authIdent.Flags = SEC_WINNT_AUTH_IDENTITY_UNICODE;
		userAcct = &authIdent;

		hres = CoSetProxyBlanket(
		   pSvc,                           // Indicates the proxy to set
		   RPC_C_AUTHN_DEFAULT,            // RPC_C_AUTHN_xxx
		   RPC_C_AUTHZ_DEFAULT,            // RPC_C_AUTHZ_xxx
		   COLE_DEFAULT_PRINCIPAL,         // Server principal name
		   RPC_C_AUTHN_LEVEL_PKT_PRIVACY,  // RPC_C_AUTHN_LEVEL_xxx
		   RPC_C_IMP_LEVEL_IMPERSONATE,    // RPC_C_IMP_LEVEL_xxx
		   userAcct,                       // client identity
		   EOAC_NONE                       // proxy capabilities
		);
	}
	
	
	if (FAILED(hres))
	{
		cout << "Could not set proxy blanket. Error code = 0x" << hex << hres << endl;
		cout << _com_error(hres).ErrorMessage() << endl;
		pSvc->Release();
		pLoc->Release();     
		CoUninitialize();
		cout << "press enter to exit" << endl;
		cin.get();					
		return 1;               // Program has failed.
	}

    // Use the IWbemServices pointer to make requests of WMI ----

    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);

    VARIANT varCommand;
    varCommand.vt = VT_BSTR;
    varCommand.bstrVal = L"cmd.exe";
    hres = pClassInstance->Put(L"CommandLine", 0, &varCommand, 0);
    VariantClear(&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;
		cout << _com_error(hres).ErrorMessage() << endl;
		SysFreeString(ClassName);
		SysFreeString(MethodName);
		if (pClass)			
		pClass->Release();
		if (pInParamsDefinition)			
		pInParamsDefinition->Release();
		if (pOutParams)			
		pOutParams->Release();
		if (pSvc)			
		pSvc->Release();
		if (pLoc)			
		pLoc->Release();     
		CoUninitialize();
		cout << "press enter to exit" << endl;
		cin.get();			
		return 1;               // Program has failed.
	}


	
    VARIANT varReturnValue;
    hres = pOutParams->Get(L"ProcessId", 0, &varReturnValue, NULL, 0);
    if (!FAILED(hres))
    {
      if ((varReturnValue.vt==VT_NULL) || (varReturnValue.vt==VT_EMPTY))
        wcout << "ProcessId : " << ((varReturnValue.vt==VT_NULL) ? "NULL" : "EMPTY") << endl;
      else
      if ((varReturnValue.vt & VT_ARRAY))
        wcout << "ProcessId : " << "Array types not supported (yet)" << endl;
      else
        wcout << "ProcessId : " << varReturnValue.uintVal << endl;
    }
    VariantClear(&varReturnValue);

    hres = pOutParams->Get(L"ReturnValue", 0, &varReturnValue, NULL, 0);
    if (!FAILED(hres))
    {
      if ((varReturnValue.vt==VT_NULL) || (varReturnValue.vt==VT_EMPTY))
        wcout << "ReturnValue : " << ((varReturnValue.vt==VT_NULL) ? "NULL" : "EMPTY") << endl;
      else
      if ((varReturnValue.vt & VT_ARRAY))
        wcout << "ReturnValue : " << "Array types not supported (yet)" << endl;
      else
        wcout << "ReturnValue : " << varReturnValue.uintVal << endl;
    }
    VariantClear(&varReturnValue);

	

    // Clean up    
    SysFreeString(ClassName);
    SysFreeString(MethodName);
    pClass->Release();
    pInParamsDefinition->Release();
    pOutParams->Release();
    pLoc->Release();
    pSvc->Release();
    CoUninitialize();
    cout << "press enter to exit" << endl;
    cin.get();	
    return 0;
}
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