Professional serial communication library - DLL for Windows & MSDOS libraries. Supports ZModem, YModem, XModem file transfer protocols, Hayes compatible modems, Microsoft Visual C/C++, Borland C/C++, Access, Visual Basic, Professional Basic, QuickBasic, & all tools that can call DLLs. Supports any number of ports running concurrently & any device that has a Windows serial communication driver (multiport card, USB - serial hubs, modems, PCMCIA).