Just came across this series of tutorials at the Autodesk website:
“Are you an Autodesk Revit power user with an interest in becoming even more productive? Would you like to automate or extend the capabilities of Revit, but are new to computer programming? If so, then this guide is designed for you.
“My First Plug-in” is a self-paced tutorial guide for a smooth introduction into the programming world. This is a “one-stop shop” learning path for users who know Autodesk products but are absolutely new to programming and are thinking about taking the plunge. In this guide, you will be working with the Autodesk Revit .NET API and the C# programming language. The supported product version is Autodesk Revit Architecture 2011 and succeeding versions.”

Find out more at Autodesk.com ..