how to access QAxObject property?

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hi ,

i have simple App that uses QAxObject
and according to msdn :
https://msdn.microsoft.com/en-us/library/aa394077%28v=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


#-------------------------------------------------
#
# 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


#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