%% 
%%  A DANTE-Edition example
%% 
%%  Example 02-16-1 on page 86.
%% 
%%  Copyright (C) 2010 Herbert Voss
%% 
%%  It may be distributed and/or modified under the conditions
%%  of the LaTeX Project Public License, either version 1.3
%%  of this license or (at your option) any later version.
%% 
%%  See http://www.latex-project.org/lppl.txt for details.
%% 
%% 
%% ==== 
% Show page(s) 1
%% 
\documentclass[]{article}
\pagestyle{empty}
\setlength\textwidth{201.70511pt}
\setlength\parindent{0pt}

\usepackage{booktabs}
\usepackage{tabularht}

\begin{document}
\fbox{%
\begin{tabularht*}{0.8in}{4in}{@{} l @{\extracolsep{\fill}} r @{}}
  top left& top right\\\interrowfill
  \multicolumn{2}{@{}c@{}}{bounding box}\\\interrowfill
  bottom left & bottom right
\end{tabularht*}}
\end{document}

.
