It is about the communication protocols of 3964R as well as 3964 for .NET.

WinSoft Communication Protocol Suite for .NET Great Features:

• It is known to include the ComPort.NET as well as the serial communication part for the users.
• It has the ability to source the codes that are contained in the registered version for the users.
• It has unique support for the 4.x the .NET Framework.
• It is royalty-free and can supply within the software.