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# sql/overview/subclass3/main.h Example File

    /****************************************************************************
    ** $Id: qt/main.h   3.3.8   edited Jan 11 14:37 $
    **
    ** Copyright (C) 1992-2007 Trolltech ASA.  All rights reserved.
    **
    ** This file is part of an example program for TQt.  This example
    ** program may be used, distributed and modified without limitation.
    **
    *****************************************************************************/

    #include <ntqapplication.h>
    #include <ntqsqldatabase.h>
    #include <ntqsqlcursor.h>
    #include "../connection.h"

    class TQSqlRecord;

    class InvoiceItemCursor : public TQSqlCursor
    {
        public:
            InvoiceItemCursor();
        protected:
            TQVariant calculateField( const TQString & name );
    };