在CVI上实现Graph图形控件上曲线的上下、左右缩放，或矩形放大，以利于察看，同时恢复曲线。实现LabVIEW系统自带的图形空间分析功能！,Graph to achieve in the CVI graphical controls on the upper and lower curves, left and right zoom, enlarge or rectangular in order to facilitate the View, at the same time recover