VB上位机串口通讯软件，采用串口插件，登陆界面，进度条，串口通讯等，希望对大家有帮助-VB PC serial port communications software, serial plug-in, the login screen, the progress bar, serial communications, and I hope for all of us to help

模拟串口加载应用程序；使用“A”作为下位机的响应码，进度条根据响应码的个数更新，直至100%。(The serial port loads the application; uses A as the response code of the lower machine, and the progress bar is updated according to the number of response codes, until 100%.)