HS XMODEM is a software library in C (supplied with full source code) that provides a programmer with the off-the-shelf support for XMODEM protocol data transfer capability. Support for both sender and receiver are provided. Other features include 1024 block size vs 128, CRC vs checksum, configurable timers and retries.
COMM-DRV/CE is a professional serial communication library for Windows/CE & Pocket PC. It supports ZModem, YModem, and XModem file transfer protocols as well as modem communication.
COMM-DRV/CE does not require that you have a Pocket PC to develop serial communication applications. It was developed with eMbedded Visual C++ 3.0 which includes a Pocket PC emulator that behaves virtually identically to any of the Pocket PCs on the market today.