How to get the motherboard serial number on Win machine?

[Mucip]

Hi,
I want to get physical ModherBoard ID and Disc ID on Windows machine. I found this website from microsoft MSDN.

But I couldn't get correct result. İt's getting error on first step.

If I run this than I will use query like 'Win32_PhysicalMedia' and 'Win32_BaseBoard' to get my demands.

I use Qt 5.14 and Qt-Creator 4.11.0 on Win 10.

Regards,
Mucip:)

[JonB]

@Mucip said in How to get the motherboard serial number on Win machine?:

CoInitializeEx

Googling for CoInitializeEx qt, does https://stackoverflow.com/questions/2979113/qcoreapplication-qapplication-with-wmi ("QCoreApplication QApplication with WMI") address your issue?

[SGaist]

Hi,

You might want to share the error you are getting.

In any case, did you try to run the code at the bottom of the article ?

[Mucip]

Hi @SGaist ,
The error is

Failed to initialize COM library. Error code = 0x -7ffefefa

Which code should I run? I coudn't see...

Regards,
Mucip:)

[Mucip]

@SGaist
I already copy all the code in to Qt-Creator if you mean C++ codes in the bottom of the page?

Regards,
Mucip:)

[Mucip]

@SGaist ,
hres = CoInitializeEx(NULL, COINIT_MULTITHREADED);

It looks this return FALSE... :(

Regards,
Mucip:)

[JonB]

@Mucip said in How to get the motherboard serial number on Win machine?:

CoInitializeEx

Googling for CoInitializeEx qt, does https://stackoverflow.com/questions/2979113/qcoreapplication-qapplication-with-wmi ("QCoreApplication QApplication with WMI") address your issue?

[Mucip]

Hi @JonB ,
As the website adwised I changed the "COINIT_MULTITHREADED" parameter to "COINIT_APARTMENTTHREADED" in first step.
But in this case I get error in second step like below:

Failed to initialize security. Error code = 0x -7ffefee7

Regards,
Mucip:)

[Chris Kawa]

@Mucip said:

It looks this return FALSE... :(

FALSE returned from CoInitializeEx does not mean it failed. It means COM is already initialized on that thread. QApplication does that. Changing the parameter causes you to have two initialization attempts with different apartments and that causes that second error.

You should use the FAILED macro to check for the result of CoInitializeEx. It checks if the returned value is <0, so FALSE , which is defined as 0, does not mean it failed.

[JonB]

@Chris-Kawa
...which is also what the code on the stackoverflow link showed to the OP...

[Chris Kawa]

@JonB And yet he continued as if it didn't so I thought I'd make it clear ;)

[Mucip]

Hi All,
I checked this website.

He add the below lines in the begining of the code.

bool WMICommunication::connect()
{
    // result code from COM calls
        HRESULT hr = 0;
        BSTR resource = SysAllocString(L"ROOT\\CIMV2");
        CoUninitialize();


        hr = CoInitializeEx(0, COINIT_MULTITHREADED);

Now everything worked well. No error but no result either. :)

The result message is:
Connected to ROOT\CIMV2 WMI namespace

OS Name : 0x167ad7b1f38

I think it's not correct result!

Why?...

Regards,
Mucip:)

[Mucip]

Hi,
I coppied all code from here in to VisualStudio cpp project and result is OK.

The problem is when I use this code in Qt and I don't know why?..

Regards,
Mucip:)

[Mucip]

Hi again,
I coppied all code again in to Qt and add the below code in the top of the code.

BSTR resource = SysAllocString(L"ROOT\\CIMV2");
    CoUninitialize();

Now it's OK. Thanks all.

[aha_1980]

@Mucip said in How to get the motherboard serial number on Win machine?:

Now it's OK. Thanks all.

Then please mark as SOLVED. Thanks!