i tried to save a dwg file as dxf ascii format file, and you will see all
the gaphical data  as ascii text as follows:

0
SECTION
2
HEADER
9
$ACADVER
1
AC1015
9
$ACADMAINTVER
70
6
9
$DWGCODEPAGE
3
ANSI_1252
9
$INSBASE
10
0.0
20
0.0
30
0.0
9
$EXTMIN
10
283.4756482805541
20
114.5337074898808
30
-0.0015258207003583
9
$EXTMAX

some stuff.

This is the drawing.dwg file saved as a drawing1.dxf. So, you can make a code
that:

1.- save the file as dxf ascii format (notice that the file can be saved as dxf
binary format)
2.- Read the attriobutes of selected blocks
3.- send that attributes to excel.
4.- manage that info as you want.

I'm beginning at vba and autocad, so, it's a little help. I hope it would be
useful