Provides undo and redo support for a document.
IDocumentUndoManager is connected to an
any change to the document is recorded and can then be undone and redone later.
Clients which are interested in undo/redo events can register an
ClassDescriptionDescribes document changes initiated by undo or redo.A standard implementation of a document-based undo manager that creates an undo history based on changes to its document.This document undo manager registry provides access to a document's undo manager.This interface is used to listen to notifications from a DocumentUndoManager.Interface for a document undo manager.