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** This file is part of the documentation of the Qt Toolkit.
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//! [0]
class MyActiveX : public QWidget, public QAxBindable
{
    Q_OBJECT
    Q_PROPERTY(int value READ value WRITE setValue)

public:
    MyActiveX(QWidget *parent = 0);
    ...

    int value() const;
    void setValue(int);
};
//! [0]


//! [1]
void MyActiveQt::setText(const QString &text)
{
    if (!requestPropertyChange("text"))
        return;

    // update property

    propertyChanged("text");
}
//! [1]


//! [2]
long AxImpl::queryInterface(const QUuid &iid, void **iface)
{
    *iface = 0;
    if (iid == IID_ISomeCOMInterface)
        *iface = (ISomeCOMInterface*)this;
    else
        return E_NOINTERFACE;

    AddRef();
    return S_OK;
}
//! [2]


//! [3]
HRESULT AxImpl::QueryInterface(REFIID iid, void **iface)
{
    return controllingUnknown()->QueryInterface(iid, iface);
}

ulong AxImpl::AddRef()
{
    return controllingUnknown()->AddRef();
}

ulong AxImpl::Release()
{
    return controllingUnknown()->Release();
}
//! [3]