用VB开发工控软件(HMI)时，经常需要对工艺参数进行趋势曲线的显示，这里提供一个实时曲线显示的程序，给大家以启发。-Using VB to develop industrial control software (HMI), we often need to process the parameters of the trend curve displayed here to provide a real-time curve shows the procedure to the U.S. t