目前用户购买电脑大部分都不带串口(RS-232)，如果需要与串口进行通讯，大部分都是用USB转串口的解决方案，但是用该方案一般分配的串口号都是大于10，在网上下载的程序大部分都不支持串口号大于10的，使用时造成不便，该控件可以解决该问题，本人已经测试并且使用到项目中，请放心下载。-Most computer users do not currently buy with serial interface (RS-232), if you need to communicate with the serial port, mostly with a USB to serial solution, but with the program generally assigned serial number is greater than 10, in Most downloaded programs do not support serial numbers greater than 10, use inconvenience, the controls can solve the problem, I have tested and used in the project, please rest assured download.