“Hello everyone, this tutorial will guide you to develop a scripted utility in 3DS MAX 9. This tutorial is for users with basic knowledge in max script or any other object oriented language. Here I explained everything step by step. Actually this coding is a part in my plug-in. Due to coding complexity, I cut shorted some and add only the few things. If time permits I will explain rest.”
http://www.cgarena.com/freestuff/tutorials/max/scriptutility/index.html