Steema Central

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public Form1()
        {
            InitializeComponent();
            InitializeChart();
        }
        private Steema.TeeChart.Styles.Line line1;
        private void InitializeChart()
        {
            line1 = new Steema.TeeChart.Styles.Line(tChart1.Chart);
            line1.FillSampleValues(10);
            line1.Pointer.Visible = true;
            line1.GetPointerStyle += new Steema.TeeChart.Styles.CustomPoint.GetPointerStyleEventHandler(line1_GetPointerStyle);
        }
        void line1_GetPointerStyle(Steema.TeeChart.Styles.CustomPoint series, Steema.TeeChart.Styles.GetPointerStyleEventArgs e)
        {
            if (e.ValueIndex < 3)
            {
                e.Style = Steema.TeeChart.Styles.PointerStyles.Nothing;
            }
            else
            {
                e.Style = Steema.TeeChart.Styles.PointerStyles.Rectangle;
            }
        }