Visual Studio eXtensibility (VSX) Video - How Do I: Create a Basic Language Service Using the Managed Babel System?
My latest VSX How Do I Video is on how to build a language service using the Managed Babel infrastructure. A Language Service is the infrastructure that allows Visual Studio to provide editing for your language, like Intellisense, syntax colouring, etc. (See Language Service Essentials for more) Managed Babel is a set of starting points to help build your own language service (see Babel Package Overview for more).
The full video can be found at How Do I: Create a Basic Language Service Using the Managed Babel System?. Here's a screenshot for a simple C-style language:
