GPS library toolkit reads and decodes standard GPS NMEA 183 sentences from the RS232 serial port as well as computes great circle distances and bearings. Runs as a background thread unattended. Works with Bluetooth and USB. The most current GPS data is always available on demand. Several C/C++ example programs are included. Works with C/C++,VC.NET,C#,MFC,C++ Builder. Register C/C++ version and also use with VB, Visual Foxpro, Xbase, Delphi, etc.