As mentioned in the previous post, the Revit SDK samples provide the biggest knowledge base on how to solve any specific programming task in Revit. The API documentation RevitAPI.chm lists the available classes and their properties and methods, and the API diagram in 'Revit API Diagram.dwf' shows their class hierarchy, but there is no information there about how they work together to provide specific functionality. The getting started document 'Getting Started Revit API 2009.doc' does provide some background information about... Read more →