Very excited about it. I am developing one max script editing environment for 3dsmax 9.0 with the help of Dot net and Scintilla. Unlike other editor it is completely integrated within max. For this project I'm using C#. But there are lot of unsafe block and platform invoke I used to talk with Scintilla from dotnet. Also one lexar I wrote for Scintilla to support max language features.
Some screenshots of work in progress...