AutoCad :: How To Convert Geometrical Data And Attribute Of Block To Excel

I am currently trying to make my AutoCad more powerful as a tool of Engineer but not Draftmen (My boss never thing about it, I could only get a standard AutoCAD, not AutoCAD-EMP).

I want to make it a tool for myself to analysis the building system, with excel (and VBA)

The first tool I wanted to create is an underground drainage capacity analysis tool. But I meet the first difficulty, how can I automatically transfer the information inside CAD drawing to the excel?

Say, There is a drainage system with 2 manhole and 1 pipe,
the Manhole have 3 attribute : Name, Model, Level, (and the X-Y coordination),
I Create a Block with attribute "Name ; Model ; Level".
and then I insert the Blocks and place it in correct location inside the Layout Plan.

How can I create some script to "Scan" all Block inside the drawing and make an excel file with data like:

Block-Serial, X-Coor, Y-Coor, Rotated Angle, Name, Model, Level.