Magnetic Compass correction value from within FSX?

[rcgldr]

I'm wondering how to get FSX magnetic compass heading correction factor from within the game. I have an old utility that outputs true heading, and I can use one of several web sites to input lat and lon and output correction factor, but I'd like to know if this is possible to do within FSX.

[ReggieF5421]

There is a file in the FSX folder Scenery\Base\Scenery named magdec.bgl. That data was compiled based upon data in 2005, probably April like the navigation database.

FSX applies the magentic change to the true headings where the user aircraft is located based upon the information in that file. In the FSX computer world, everything is based on true headings - to 15 decimal places.

[scott967]

AFSD is a program which connects to FSX via fsuipc, and will provide the magdec at the user aircraft location.
http://hsors.pagesperso-orange.fr/hssoft0705/AFSD3_setup.exe

scott s.
.

[rcgldr]

AFSD is a program which connects to FSX via fsuipc.Thanks.