MarshallSoft C/C++ serial communications component library for RS232 and multi-drop RS485 and RS422 serial ports.

Features of WSC4C include:

- Supports 256 ports. Can control multiple ports simultaneously.
- Fully thread safe, port re-entrant, modem control, serial line status and control, ANSI emulation, ASCII/XMODEM/YMODEM.
- Uses the standard Windows API to communicate with any device connected to a serial port. Use WSC4C to write applications to control serial devices such as barcode scanners, modems, lab instruments, medical devices, USB serial devices, scales, GPS navigation, fingerprint scanner, printer servers, etc.
- Supports virtual serial ports (USB to serial converter, Bluetooth serial).
- State driven Xmodem and Ymodem on multiple ports simultaneously (up to 256 connections).
- Can send Windows messages on completion of events (incoming character, etc.).
- Includes over 38 functions plus modem control. Supports any baud rate. Ability to specify the parity, word size, and number of stop bits.
- Includes multiple C/C++/C# example programs.
- Includes 64-bit (WSC64.DLL), 32-bit (WSC32.DLL) and 16-bit (WSC16.DLL).
- Supports most Windows C/C++ compilers (Microsoft (all versions Visual C++, Visual Studio through 2010, Visual C#, and Visual C++ .NET), Borland, Watcom, LCC-WIN32, etc.). Can be used with Microsoft Foundation Class and Borland C++ Builder.
- Does not depend on support libraries. Makes calls to Windows API functions only. Can also use with Delphi, Visual Basic (VB.NET), PowerBASIC, Visual FoxPro, dBase, Xbase++, and COBOL.
- License covers all programming languages.
- Royalty free distribution with a compiled application.
- Source code available.
- Free technical support and updates for one year.