nel</B> (in)<DD>
The channel for which to create or delete a close callback.
<P><DT>Tcl_CloseProc <B>*proc</B> (in)<DD>
The procedure to call as the callback.
<P><DT>ClientData <B>clientData</B> (in)<DD>
Arbitrary one-word value to pass to <I>proc</I>.
<P></DL>
<H3><A NAME="M5">DESCRIPTION</A></H3>
<B>Tcl_CreateCloseHandler</B> arranges for <I>proc</I> to be called when
<I>channel</I> is closed with <B><A HREF="OpenFileChnl.html">Tcl_Close</A></B> or
<B><A HREF="OpenFileChnl.html">Tcl_UnregisterChannel</A><