The Microsoft® SQL Server™ OLAP Services OLAP Manager supports the integration of custom programs, referred to as add-in programs, that can interact with and enhance the OLAP Manager user interface. You can create and register add-in programs that will be called by the OLAP Add-In Manager in response to user activity in the OLAP Manager user interface. Your custom add-in programs can optionally use Decision Support Objects (DSO) to manage server objects. Multiple add-in programs can be registered.