上传一个VB串口通讯源代码_数据请求端，此代码需要进一下考虑，希望大家测试、共享、参考。-Upload a VB serial communication source code _ data requests end, this code need into consideration, testing, sharing, reference.

端口传送实现端口之间的数据传送与接收并能在文本框中显示-Port send the sending and receiving of data between the port and can be displayed in the text box