Structured Storage Fundamentals

Structured Storage provides the equivalent of a complete file system for storing objects through the elements listed in the following table.

Structured Storage Interfaces The IStorage, IStream, ILockBytes, and IRootStorage interfaces, along with a set of related interfaces —IPersistStorage, IPersist, IPersistFile, and IPersistStream.
Structured Storage API Functions Helper APIs that facilitate an implementation of structured storage, as well as a second set of APIs for compound files; that is the COM implementation of the structured storage interfaces. COM also provides a set of supporting structures and enumeration values used to organize parameters for interface methods and APIs.
Structured Storage Access Modes A set of access modes for regulating access to compound files.