extern "C" void GpsNotification(GPSNOTIFYCODE gncCode, long lParam1, long lParam2, long lParam3)
{
    switch (gncCode)
    {
        case GPSNOTIFY_DATA_CHANGED:
        {
            GPSPOSITION gpPos;
            gpPos = GpsGetPosition(GPSFORMAT_DEGREES);
            printf("Latitude %lf, Longitude %lf, HDOP %.1lfn", gpPos.dLatitude,
            gpPos.dLongitude, GpsGetHDOP());
        }
        break;
        default:
            printf("%sn", (LPSTR)lParam2);
    }
}

int main(int argc, char* argv[])
{
        GpsSetNotificationCallback((GPSNOTIFYPROC)GpsNotification, 0);

        if (GpsInitialize(0, 4800, GPSPROTOCOL_UNKNOWN, GPSENABLE_FALSE) != GPSERROR_NONE)
        {
            printf("GPS failed to initializen");
            return 0;
        }

        printf("Press enter to start the GPS...n");

        getchar();

        // Start up the GPS Engine

        GpsEnable(GPSENABLE_TRUE);

        printf("Press enter to stop the GPS...n");

        getchar();

        // Shut down everything

        GpsTerminate();

        return 0;
}