[Updated] MODBUS Serial RTU + TCP/IP Simulator
Rating: 
Conrad Braam - 11/06/2009
If you are unable to find a free Modbus Slave simulator, here is one.Remote Communication Made Easy
Rating:
Ken Reed - 11/07/2003
Exchange data with remote computers using the standard streaming operators '<'< and '>'>.
Implementing Serial Communication in Win9X/2000
Rating:
Shibu K.V. - 10/01/2002
Serial data transmission seems a bit difficult for those who are new to the world of serial communication and VC++. Check out this simple class for implementing serial transmission using WINAPI functions.
Serial Communication in Windows
Rating: 
Ashish Dhar - 08/15/2002
Discover how to do serial communication from within your own applications from this detailed article.
A communication class for serial port
Rating:
Remon Spekreijse - 02/08/2000
A communication class for serial port
CSerial - A C++ Class for Serial Communications
Rating:
Tom Archer and Rick Leinecker - 08/07/1999
CSerial - A C++ Class for Serial Communications
All
