hello ,i want to rebuild solid 3d models using d3d api,is there any free libraries that can export the necessary points in .dwg file?

We have the DirectX Export (.X files) utility for AutoCAD - see:
http://www.xanadu.cz/en/apps/directxexport/
 

thank you very much,i changed the dwg file into .x format as you told me,it's a good tool!thank you.But if i rebuid a solid model from dwg file,what kinds of information should i archive?what i get are just some points,faces,edges and linesegs.how can i get the final triangle and indices information?can dwgdirect get all the necessary informations to rebuild the solids in dwg file?