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 VB example programs are included. Works with all versions Visual Basic (VB.NET). Register VB version and also use with C/C++, Visual Foxpro, Xbase, Delphi, etc.