实现动态更新二维图形，使用第三方ZedGragh控件显示曲线。使用VS2010编程。稍作改动即可满足实时刷新曲线的要求。-Dynamically updated two-dimensional graphics, use the third party ZedGragh control displays the curve. Using VS2010 programmed. Some minor changes to meet the requirements of real-time refr