how to access QAxObject property?

hi ,

i have simple App that uses QAxObject
and according to msdn :
https://msdn.microsoft.com/en-us/lib...=vs.85%29.aspx

it have property SMBIOSBIOSVersion

but i don't know how to access this property in qt without any external libs
it just return QVariant(Invalid)

untitled.pro

Code:

---

#-------------------------------------------------
#
# Project created by QtCreator 2015-02-17T09:27:36
#
#-------------------------------------------------
 
QT       -= core
 
QT       += gui
 
TARGET = untitled
CONFIG   += console
 
QT += widgets axcontainer
 
CONFIG   -= app_bundle
 
TEMPLATE = app
 
 
SOURCES += main.cpp

---

main.cpp

Code:

---

#include <QApplication>
#include <QDebug>
#include <QMessageBox>
#include <QList>
#include <QByteArray>
#include <QVariant>
#include <ActiveQt/QAxBase>
#include <ActiveQt/QAxObject>
 
int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
 
    QAxObject *objIWbemLocator = new QAxObject("WbemScripting.SWbemLocator");
    QAxObject *objWMIService = objIWbemLocator->querySubObject("ConnectServer(.,root\\cimv2)");
    QAxObject *objStartup = objWMIService->querySubObject("ExecQuery(Select * from Win32_BIOS)");
 
    qDebug() << "SMBIOSBIOSVersion: " << objStartup->property("SMBIOSBIOSVersion");
    qDebug()<<"Hello World";
 
    return a.exec();
}

---

win xp sp3
vs 2010 sp1
qt 5.4.0