WMI problem to retrieve LogicalDisk Size & FreeSpace

Hello,

I have a problem to retrieve the size and free space of logical disks via WMI.

The values are uint64 type, but impossible to retrieve them into the VARIANT struct.

The problem seems to be with the uint64 types only...

Anybody have a solution ?

(My code is bellow... works perfectly with other classes)

...
 
    if (FAILED(pSvc->ExecQuery(
        BSTR(L"WQL"),
        BSTR(L"SELECT * FROM Win32_LogicalDisk"),
        WBEM_FLAG_FORWARD_ONLY | WBEM_FLAG_RETURN_IMMEDIATELY, 
        NULL,
        &pEnumerator)))printf("erreur - ExecQuery\n");
    else
    { 
        IWbemClassObject *pclsObj;
        ULONG uReturn = 0;
   
        while (pEnumerator)
        {
            pEnumerator->Next(WBEM_INFINITE, 1,&pclsObj, &uReturn);
            if (0 == uReturn) break;
            VARIANT vtProp;
 
            pclsObj->Get(L"Size", 0, &vtProp, 0, 0);
            printf("=> %lld\n", vtProp.uintVal); // here is the problem...
 
            VariantClear(&vtProp);
            pclsObj->Release();
        }
        pEnumerator->Release(); 
    }
 
...

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