By Lab Windows CVI development environment (based on the Visual c++ development) to realize the PC, between any two serial ports to send and receive, a serial port and one serial port, after receiving forwarded back.

com_source
..........\79POSITION.txt
..........\com.c
..........\com.cws
..........\com.exe
..........\com.h
..........\com.prj
..........\com.uir
..........\com_dbg.cdb
..........\com_dbg.exe
..........\g_study.C
..........\LAOHUA1.C
..........\TOOLBOX.C
..........\TOOLBOX.FP
..........\TOOLBOX.H
..........\TOOLBOX.OBJ
..........\说明.txt
..........\save
..........\....\Errora
..........\....\Errorb

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