I have used AutoCAD sometimes. Try to use the foollowing:

(based on AutoCAD2008)

Click on Menu/Tools/Data extraction

Step 1 select "create new data  extraction"

step 2 data source select Drawing/sheet or select object in the
curring drawing

Step 3 you will see all the blocks in the current drawing, selecte
the one you need

Step 4 you will see all the entities/properties you want/need

step 5 you will see all the block you selected and its entities data,
in a table, you can make some task there.

step 6 you can select between put all the data in a table  in the
current drawing or exporting it all to external file, e.g. excel!!!
xls!!! txt, cvs, etc, i recomend you to select xls, give the name a
then click next

Step 7... there is nothing to do here

Step 8... click in finish

When you get your xls file, you can manage you information as you
want... Good luck!!!! (Sorry by my english, I'm from Argentina)

PS: in AutoCAD 2006/2007, it tool is called Attribute extraction, it
seems like AutoCAD 2008