好 该系统在VB6.0环境下进行开发，开始时采用了VB包含的Activex控件技术绘制曲线-GOOD

VB编写的与PCL下位机通信的程序，主要使用VB的mscomm控件实现，其中还包括实时曲线的绘制-VB, and PCL next crew communication procedures, the main use of VB mscomm control implementation, which also includes real-time curve drawing

用vb的timer控件模拟数据采集，并在picturebox里绘制坐标系和实时数据采集曲线-The timer control with vb analog data acquisition, and draw coordinates and real time data acquisition curve in picturebox