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<!DOCTYPE html PUBLIC "-//w3c//dtd html 4.0 transitional//en">
<html><head>
  <meta content="text/html; charset=iso-8859-1" http-equiv="Content-Type">
  <meta content="IBM" name="Author">
  <meta content="Mozilla/4.75 [en] (Windows NT 5.0; U) [Netscape]" name="GENERATOR"><title>Document Undo Support</title></head>

<body>
<p>Provides undo and redo support for a document.</p>
<h3>Package Specification</h3>
<p>When an <tt>IDocumentUndoManager</tt> is connected to an <tt>IDocument</tt>, 
  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 <tt>IDocumentUndoistener</tt>
  with the <tt>IDocumentUndoManager</tt>.</p>
</body></html>