Forex_Strategy_Builder.Info_Panel.ScrollBar_Scroll C# (CSharp) Method

        void ScrollBar_Scroll(object sender, ScrollEventArgs e)
        {
            CalculateTabs();
            int horizontal = hScrollBar.Visible ? hScrollBar.Height : 0;
            int vertical   = vScrollBar.Visible ? vScrollBar.Width  : 0;
            Rectangle rect = new Rectangle(border, (int)captionHeight, ClientSize.Width - vertical - 2 * border, ClientSize.Height - (int)captionHeight - horizontal - border);
            Invalidate(rect);
        }