/B>, or using the Tcl <B><A HREF="../TclCmd/close.html">close</A></B> command.
<I>Proc</I> should match the following prototype:
<P>
<PRE>typedef void <B>Tcl_CloseProc</B>(
        ClientData <I>clientData</I>);</PRE>
<P>
The <I>clientData</I> is the same as the value provided in the call to
<B>Tcl_CreateCloseHandler</B>.
<P>
<B>Tcl_DeleteCloseHandler</B> removes a close callback for <I>channel</I>.
The <I>proc</I> and <I>clientData</I> identify which close callback to
remove; <B>Tcl_DeleteCloseHandler</B> 