 &amp; block handle of the HugeArray).</LI>
<LI>
The message data are not volatile, as they are stored in a VM file provided by the Mailbox library.</LI>
<LI>
The subject line, which is something like &quot;Address book entry for <EM>
name</EM>
&quot;, where <EM>
name</EM>
 is the Name field of the entry.</LI>
</UL>
<P>
As for any registered message, the Mailbox library will call the data driver, passing it the HugeArray's address and the data-is-volatile flag. The VM tree data driver will copy the array to