VB串口画坐标曲线，将下位机传来的数据读出来，用图线显示出来-VB serial painting coordinate curve, will read out the data from the next-bit machine, the line is displayed in Fig.

利用VB编写的步进电机控制程序，可实现步进电机按着制定文件内的坐标逐点移动-Stepper motor control program