Learn how to read and write Open XML files in the new Microsoft Office 2007, with a particular examination of the Excel file format..
The NMEA data exported by GPS units gives latitude and longitude and geometric distance above the WGS84 (GRS80) reference ellipsoid. The Ordnance Survey maps for Great Britain use grid references based on the Airy Spheroid (OSGB36) reference ellipsoid. The following article discusses a C# class to convert GPS derived NMEA data to the British Ordnance Survey Grid. .
Although socket based TCP/IP servers using IO Completion Ports are often written in C++ it's sometimes useful to write such a server in Visual Basic..