This is the online version of the SFP IPC Interface Guide. Click on the read more link below to read the full article.
[...]

Super Flight Planner is known to generate realistic enough flight plans to comfortably flying your ATC plans. However it lacks a feature to display flight plan path without arc curves to compensate for the transition from a waypoint to another. Generally you don't bother display a smooth arc when you are at FL410. But, what if you have to do a smooth turn while descending to an approach?
[...]

This source snippet formats a Latitude/Longitude value for use with Flight Simulator/X new XML flight plan format. Seconds values must be clamped to a value ranged between 0.01 and 59.99...

In this tutorial you will learn the basics of Super Flight Planner: creating a new database, create a new flight plan, send navaids to flight plan, change the aircraft, saving the flight plan and finally, exporting Flight Plans to FS GPS....