com口通讯程序，vb的很简单，对了解vb的com控件很有帮助，协议是老师给的，看看源代码就知道了，调试需要虚拟串口-com port communication procedures, vb s very simple, to the understanding of the com controls vb helpful that the agreement was given by the teacher to see the source code to know the needs o

IrDA communication through virtual com port

可以用来进行串口调试，串口模拟，可以两个模拟串口进行通信，方便用来做软件调试。-The Null-modem emulator is an open source kernel-mode virtual serial port driver for Windows, available freely under GPL license. You can create an unlimited number of virtual COM port pairs and use any p