COMM-DRV/Lib is a professional serial communications libraries for Windows and MSDOS. Includes a set of state driven Xmodem, Ymodem, and Zmodem(w/crash recovery) file transfer communication libraries. It includes 32 bit and 16 bit DLLs & libraries for Windows as well as 16 bit libraries for MSDOS, supports Microsoft Visual C/C++ and Borland C/C++, support Visual Basic, Microsoft Access, or any other language or tool capable of calling DLLs, includes complete online documentation, and complete printed documentation. Provide virtually the same API for Windows Vista, Windows XP, Windows 2000, Windows NT, Windows Me, Windows 98, Windows 3.x, & MS-DOS. Any number of ports may be active at the same time. Built-in hardware and software handshaking for flow control (DTR/DSR, RTS/CTS,XON/XOFF).

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