The Windows Standard Serial Communications Library for Visual FoxPro (WSC4FP) is an asynchronous communications dynamic link library (DLL) which uses the standard Windows API (Application Programmer's Interface) to communicate with any device connected to a serial port. WSC4FP includes 28 functions plus modem control, ASCII/XMODEM/YMODEM protocols, and a good selection of example programs. Requires Visual FoxPro (version 3.0 and above).