给mschart控件加滚动条，实现放大缩小功能-Add to mschart control scroll bars, zoom function to achieve

个人编写的实验室车辆GPS配套监控程序，内部含TCPIP收发通讯，数据库管理，MSCHART绘图等一系列完善功能-Personal Vehicle GPS supporting the preparation of laboratory control procedures, internal transceiver with TCPIP communication, database management, MSCHART drawing and a series of improved fe

利用MSCHart做柱状图，饼状图，拆线图。有时数据项太多，想用个滚动条很不好加，找不到好的资料自己加了一个，虽不正宗，大家也是参考- use MSCHart to draw pie or bar.just because here are no scrollbar ,so bad to use ,and can t find a good one .so add by myself.