In-Process and Out-of-Process Plug-ins
Authentication, event notification, and authorization plug-ins can be loaded as either in-process or out-of-process objects. All other types of plug-ins are loaded as in-process objects. Loading a plug-in out-of-process can prevent a failure in a plug-in from extending to Windows Media Services and to other plug-ins. However, out-of-process objects incur more overhead and are slower because their data must be marshaled to cross process boundaries. Plug-in load type is discussed in the following sections.