Read DWF Autoca file

How can i read autocad dwf file with blitz ?

where can i found the structure definition of a dwf file ?

thank

http://www.wotsit.org/search.asp?page=12&s=ALLFILES


EDIT: Oops, I thought you wanted the .dxf file format, but you want the .dwf file format... My mistake! :-P


EDIT: Maybe this is what you want?

http://filext.com/detaillist.php?extdetail=DWF