vb编写的读条形码机的简单程序,附带设计录像,适合初学者学习用

本设计要求使用微机与可编程控制器通过串行通信接口进行连接，采用VB编写通信应用程序，使微机与可编程控制器进行数据交换-This design requires the use of computer and programmable logic controller through the serial communication interface to connect, using the preparation of communications VB application, so th

通过vb设计上位机软件 实时改变led点阵屏要显示的内容-Through the vb design PC software real-time change of led dot matrix LCD display content