Create XML from DWG

Hi all,
I'm quite new to autocad customization and I need to decide a strategy
to accomplish my task. I need to open some dwg (autocad 2004) files,
extract informations about the entities contained and save them in a
text or an xml file to finally insert those infos in a SQL db.
DWG files contains polylines to represent for example a room and for
each of them there is a block inside it which contains the attributes
for that room (I didn't find a way to add attributes directly to a
polyline).
Actually I'm thinking at a vba macro which open the files, loop trough
the entities and writes the xml/text file.
Is there another/better way to realize that? For example a standalone
..NET app able to open dwg files and extract infos?
Thanks all

PS: I'd like to avoid using c++.

 

Yes, but specifications requires to export an xml/txt file before
inserting it in a db. You said it's possible, how?
Thanks