All you need to do is find some packages for Opengl or directx for your language. Or if you know how to do that then the easiest way I have found is to find some ones example project for .dxf
I have an awesome one for delphi but I cant find the link for it but there should be plenty of stuff published..
Anyway the way I convert to .dxf is to use S3dspy to extract the zones .wld file. Then use Zone Converter to create a .obj file..
Then I use Metasequoia
http://www.metaseq.net/english/index.html
To load the .obj file and then it can be saved as a .dxf file wich will give me
all the info I need to know the exact dimnsions of the zone.
You can also view the zones geometry in Meta.
Note..Not all zones will convert to .obj file..Zone converter can and does crash sometimes..