n</I> or a descendant of a sibling.
If NULL then <I>tkwin</I> is restacked above or below all siblings.
<P></DL>
<H3><A NAME="M5">DESCRIPTION</A></H3>
<B>Tk_RestackWindow</B> changes the stacking order of <I>window</I> relative
to its siblings.
If <I>other</I> is specified as NULL then <I>window</I> is repositioned
at the top or bottom of its stacking order, depending on whether
<I>aboveBelow</I> is <B>Above</B> or <B>Below</B>.
If <I>other</I> has a non-NULL value then <I>window</I> is repositioned
just ab