file_id.diz

it is a source code from mathworks

MarshallSoft GPS Component for C/C++.
Version 2.0. (MGC4C20.ZIP) June 22, 2007.
Receive & decode standard NMEA 183 sentences
from your GPS receiver. Requires Windows 
C/C++ compiler. By MarshallSoft Computing.
Registration is $105 ($195 with source) and
includes one year of free updates.