Auto- & BricsCAD VBA Online Tutorials

First be aware that also for VBA there is a chapter in the AutoCAD Developer Reference that you find among the help files that come with your AutoCAD installation. Secondly I want to point out that the tutorials linked here are actually written for AutoCAD. If you want to write VBA code for BricsCAD I would suggest to have a look at the material here and then adapt it to BricsCAD by means of the VBA section in the BricsCAD Developer Reference.

HyperPics: Introduction to VBA for AutoCAD
HyperPics offers a very short intro to AutoCAD VBA ("Preview copy of the Introduction to VBA eBook") along with some code expamles ("Tutorials for Preview copy of Intro to VBA eBook") which really come in a zip-file and NOT as a pdf (as claimed on their page).

Writing AutoCAD Macros with VBA
The first chapter of the book "VBA for AutoCAD 2002: Writing AutoCAD Macros"

AfraLisp.net: VB/VBA Tutorials
Very well written tutorials by Kenny Ramage & David Watson. (In case the AfraLisp.net site gets display incorrectly in FireFox 3.5 or higher then look here.)

AUGIWorld: VBA Foundations
A tutorial in VBA programming for beginners in 12 parts

Google books: AutoCAD 2006 VBA: a programmer's reference
Almost all of the book by Joe Sutphin

Autodesk: AutoCAD VBA: Integrating with Microsoft Excel

Autodesk: AutoCAD VBA: Integrating with Microsoft Access