Beginning with ASCOM Platform 6, the interface definitions are provided as documentation with the Platform itself. These documents are auto-generated from the interface sources in order to assure exact correspondence between the documents and the actual interfaces. After installing ASCOM Platform 6, you will see, in your Windows Start menu under ASCOM Platform, an item Help and Device Interface Standards.
For developers, please note that there is additional information contained in the ASCOM Platform Developer Components. If you are a developer, it is strongly recommended that you install the Developer Components and become familiar with the many tools and extensive information we have provided.
Finally, these interface definitions apply to both the COM/ActiveX infrastructure on Windows, as well as to the newer platform-agnostic ASCOM Alpaca network HTTP/JSON infrastructure.
For more information see the documents listed in the menu to the left.