e if and only if it is capable of performing i/o.</P>

<A NAME="auto_close"></A>
<H4><CODE>chain::auto_close</CODE></H4>
<PRE CLASS="broken_ie">    <SPAN CLASS="keyword">bool</SPAN> auto_close() <SPAN CLASS="keyword">const</SPAN>;</PRE>

<P>Indicates whether the Filters and Devices in this chain will be closed automatically if <A HREF='#pop'><CODE>pop</CODE></A> is invoked while the chain is complete. Returns <CODE>true</CODE> unless the auto-close feature has been disabled using <A HREF='#set_auto_close'><