This documentation provides miscellaneous-related information about the set of interfaces for objects related to Windows Mail (formerly Outlook Express).
New applications should not use this set of interfaces and schemas. These interfaces and schemas exist for backward compatibility with legacy applications. These interfaces and schemas will be unavailable in the future.
Do not use. Interface to an Windows Mail storage namespace object. Using this interface, you can create, enumerate, and modify message folders, as well as copy and move messages.