Dont give up
the "AeccXUiLand.AeccApplication.8" refers to a version of Civ3d 2011 you have to know what it is called to get inside the architecture database maybe "AeccArchi.AeccApplication.8" ? try Theswamp.org also.
Check out your "sample" directory it should have a directory called say d:\autocad 2011\sample\archi API\com this will have vba etc examples of code to access the database.
Just do a VBAMAN and load the dvb, read the Reame.txt first to see what it does.