ONG></DT>
    <DD>If the device is turned off or is running low on memory,
        your VILFile library will have to store its state in a
        heap block; later on, it will have to restore its state
        from the data in that block.  Your code should be able to
        store the name and location of the current document, along
        with the current state of UI gadgetry.</DD>
<DT><STRONG>Customize the UI that displays and edits the document.</STRONG></DT>
    <DD>A <A HREF="#FSLib.htm_ViewerDialog">