Revit API Resource page

If you head over to this link, you will find a nice collection of Revit API resources, including:

• My First Revit Plug-in (self-paced tutorial guide for a smooth introduction into the programming world)
• SDK downloads
• Introduction to Revit 2011/2012 Programming (DevTV videos)

There is also a very handy package from the Revit API Labs.  If you unzip the following file, you can find actual class handout documents, presentation slides, and source code samples for both VB and CS (C Sharp, C#) languages:
Revit API 2012 Training (zip - 12726Kb)
 
via
Autodesk - Developer Center - Autodesk� Revit� Architecture, Autodesk� Revit� Structure and Autodesk� Revit� MEP