*.DXF file read and 3D show

Hi,
I want to read out a *.DXF(AUTOCAD format) file and show it on screen with 3D mode, how can I do this?
Where can I get some information about this?
thanks a lot.

maybe this will help you:
www.autodesk.com/techpubs/autocad/acadr14/dxf/index.htm
…mekron