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# sql/overview/subclass4/main.h Example File

    /****************************************************************************
    ** $Id: qt/main.h   3.3.3   edited May 27 2003 $
    **
    ** Copyright (C) 1992-2002 Trolltech AS.  All rights reserved.
    **
    ** This file is part of an example program for Qt.  This example
    ** program may be used, distributed and modified without limitation.
    **
    *****************************************************************************/

    #include <qapplication.h>
    #include <qsqldatabase.h>
    #include <qsqlcursor.h>
    #include "../connection.h"

    class QSqlRecord;

    class InvoiceItemCursor : public QSqlCursor
    {
        public:
            InvoiceItemCursor();
        protected:
            QVariant calculateField( const QString & name );
    };