Getting NULL value from 'Win32_LogonSession' through WMI [modified]
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hmm I tested it and it worked for me... Here's my test code - I took your code and added stuff to the top (copied right from that MSDN sample code) for me to build it...
int GetRemoteLoggedOnUsers()
{
HRESULT hres = WBEM_S_NO_ERROR;//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 // ); // //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 root\\cimv2 namespace with // the current user and obtain pointer pSvc // to make IWbemServices calls. hres = pLoc->ConnectServer( \_bstr\_t(L"ROOT\\\\CIMV2"), // 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 &pSvcMark :))))))))))))))))))))))))))) U are genious ! I am getting the name now :))thank you so much!!!!!!! Have a gr8 day ahead ! Best Regards, Supriya Tonape.
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Mark :))))))))))))))))))))))))))) U are genious ! I am getting the name now :))thank you so much!!!!!!! Have a gr8 day ahead ! Best Regards, Supriya Tonape.
You're welcome. You have a great day as well! :) Cheers, Mark
Mark Salsbery Microsoft MVP - Visual C++ :java:
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Mark :))))))))))))))))))))))))))) U are genious ! I am getting the name now :))thank you so much!!!!!!! Have a gr8 day ahead ! Best Regards, Supriya Tonape.
I am still wondering what exact mistake i was doing, all flags were set properly.. let me check in detail so I wont make it in future. Thx so much again. ! :) Regards, Supriya Tonape.
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Mark :))))))))))))))))))))))))))) U are genious ! I am getting the name now :))thank you so much!!!!!!! Have a gr8 day ahead ! Best Regards, Supriya Tonape.
Also, if you remove the "WHERE LogonType = 2 OR LogonType = 10" from the outer query, you can see all logon sessions, not just the interactive ones. :) Mark
Mark Salsbery Microsoft MVP - Visual C++ :java:
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Also, if you remove the "WHERE LogonType = 2 OR LogonType = 10" from the outer query, you can see all logon sessions, not just the interactive ones. :) Mark
Mark Salsbery Microsoft MVP - Visual C++ :java:
yup Mark. You really made my day :) U have gr8 weekend ahead! Best Regards, Supriya.
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yup Mark. You really made my day :) U have gr8 weekend ahead! Best Regards, Supriya.
Supriya Tonape wrote:
U have gr8 weekend ahead!
Thank you....you too!
Mark Salsbery Microsoft MVP - Visual C++ :java:
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Supriya Tonape wrote:
U have gr8 weekend ahead!
Thank you....you too!
Mark Salsbery Microsoft MVP - Visual C++ :java:
Also in this code though I have kept 'logontype' as 2 and 10 to get only active user names, but it;s returning me all users those are Disc earlier...
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Also in this code though I have kept 'logontype' as 2 and 10 to get only active user names, but it;s returning me all users those are Disc earlier...
Supriya Tonape wrote:
but it;s returning me all users those are Disc earlier..
Which means what? :) Mark
Mark Salsbery Microsoft MVP - Visual C++ :java:
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Supriya Tonape wrote:
but it;s returning me all users those are Disc earlier..
Which means what? :) Mark
Mark Salsbery Microsoft MVP - Visual C++ :java:
:) actually i will check it.. I just need usernames who has active session.
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:) actually i will check it.. I just need usernames who has active session.
Hi Mark, I just realized that 2nd query which forms like "Associators of {Win32_LogonSession.LogonId=1121214} Where AssocClass=Win32_LoggedOnUser Role=Dependent" works for local machine but when I try to execute it on remote machine after above query executes, at next line it fails... Query execution passes but enumeration fails.. at below line, HRESULT hr1 = pEnumerator1->Next(WBEM_INFINITE, 1, &pclsObj1, &uReturn1); I have been trying different things to check out but no luck, any idea why it cud be happening or is there any change in query while running on remote machine ? Regards, Supriya Tonape
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Hi Mark, I just realized that 2nd query which forms like "Associators of {Win32_LogonSession.LogonId=1121214} Where AssocClass=Win32_LoggedOnUser Role=Dependent" works for local machine but when I try to execute it on remote machine after above query executes, at next line it fails... Query execution passes but enumeration fails.. at below line, HRESULT hr1 = pEnumerator1->Next(WBEM_INFINITE, 1, &pclsObj1, &uReturn1); I have been trying different things to check out but no luck, any idea why it cud be happening or is there any change in query while running on remote machine ? Regards, Supriya Tonape
Hi All, For some reason, when I add the following lines, to get the StartTime property value, the get function fails. Any ideas?
VARIANT vtProp2;
HRESULT hr2 = pclsObj1->Get(L"StartTime", 0, &vtProp2, 0, 0);
if(hr1 == S_OK)
{
SYSTEMTIME t;
int res = VariantTimeToSystemTime(vtProp2.dblVal, &t);
}