Concepts (PowerPoint 2010 PIA)
If you are just beginning to write add-ins for Microsoft PowerPoint 2010, you should first refer to the conceptual content in the PowerPoint 2010 Developer Reference. Even though the programming environment and accessing certain methods and connecting to events are different in COM and in managed development, features in the PowerPoint object model behave the same way in both COM and managed development. You can refer to the conceptual content in the PowerPoint 2010 Developer Reference to understand how to use the different features of the object model.
If you are already familiar with the PowerPoint object model, you have some experience writing managed applications, and you are using the PowerPoint PIA for the first time, start with Installing and Referencing the PowerPoint PIA.