Features of WSC4D include: Supports 256 ports. Can control multiple ports simultaneously. Fully thread safe, port re-entrant, modem control, serial line status and control, and ANSI emulation. Uses the standard Windows API to communicate with any device connected to a RS232 serial port. 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 52 functions plus modem control. Supports any baud rate. Ability to specify the parity, word size, and number of stop bits. Includes multiple Delphi example programs. Includes 32-bit and 64-bit DLLs. Supports all 32-bit and 64-bit Delphi compiles from Delphi 4 through Delphi XE8 and Delphi Seattle and Berlin. Does not depend on support libraries. Makes calls to Windows API functions only. The same WSC32.DLL and WSC64.DLL can be used from any supported (C/C++, Delphi, Visual Basic, PowerBASIC, Visual FoxPro, Visual dBase, Xbase++, COBOL) language. License covers all programming languages. Royalty free distribution with a compiled application. Source code is available. Free technical support and updates for one year. Full documentation. Supports Windows XP, Vista, Win7, Win8, Win10. Fully functional evaluation version.