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main.cpp Example File
activeqt/simple/main.cpp

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 #include <QAxBindable>
 #include <QAxFactory>
 #include <QApplication>
 #include <QLayout>
 #include <QSlider>
 #include <QLCDNumber>
 #include <QLineEdit>
 #include <QMessageBox>

 class QSimpleAX : public QWidget, public QAxBindable
 {
     Q_OBJECT
     Q_PROPERTY( QString text READ text WRITE setText )
     Q_PROPERTY( int value READ value WRITE setValue )
 public:
     QSimpleAX(QWidget *parent = 0)
     : QWidget(parent)
     {
         QVBoxLayout *vbox = new QVBoxLayout( this );

         slider = new QSlider( Qt::Horizontal, this );
         LCD = new QLCDNumber( 3, this );
         edit = new QLineEdit( this );

         connect( slider, SIGNAL( valueChanged( int ) ), this, SLOT( setValue(int) ) );
         connect( edit, SIGNAL(textChanged(const QString&)), this, SLOT(setText(const QString&)) );

         vbox->addWidget( slider );
         vbox->addWidget( LCD );
         vbox->addWidget( edit );
     }

     QString text() const
     {
         return edit->text();
     }
     int value() const
     {
         return slider->value();
     }

 signals:
     void someSignal();
     void valueChanged(int);
     void textChanged(const QString&);

 public slots:
     void setText( const QString &string )
     {
         if ( !requestPropertyChange( "text" ) )
             return;

         edit->blockSignals( true );
         edit->setText( string );
         edit->blockSignals( false );
         emit someSignal();
         emit textChanged( string );

         propertyChanged( "text" );
     }
     void about()
     {
         QMessageBox::information( this, "About QSimpleAX", "This is a Qt widget, and this slot has been\n"
                                                           "called through ActiveX/OLE automation!" );
     }
     void setValue( int i )
     {
         if ( !requestPropertyChange( "value" ) )
             return;
         slider->blockSignals( true );
         slider->setValue( i );
         slider->blockSignals( false );
         LCD->display( i );
         emit valueChanged( i );

         propertyChanged( "value" );
     }

 private:
     QSlider *slider;
     QLCDNumber *LCD;
     QLineEdit *edit;
 };

 #include "main.moc"

 QAXFACTORY_DEFAULT(QSimpleAX,
            "{DF16845C-92CD-4AAB-A982-EB9840E74669}",
            "{616F620B-91C5-4410-A74E-6B81C76FFFE0}",
            "{E1816BBA-BF5D-4A31-9855-D6BA432055FF}",
            "{EC08F8FC-2754-47AB-8EFE-56A54057F34E}",
            "{A095BA0C-224F-4933-A458-2DD7F6B85D8F}")


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Qt 4.3.5