% This macro source file is from the four volume series
% "TeX in Practice" by Stephan von Bechtolsheim, published
% 1993 by Springer-Verlag, New York.
% Copyright 1993 Stephan von Bechtolsheim.
% No warranty or liability is assumed.
% This macro may be copied freely if no fees other than
% media cost or shipping charges are charged and as long
% as this copyright and the following source code itself
% is not changed. Please see the series for further information.
%
% Version: 1.0
% Date: May 1, 1993
%
%
% This source code is documented in 7.4.4, p. I-241.
% Original source in file "vboxes1.TEX", starting line 1737.
\wlog{L: "redtost.tip" ["vboxes1.TEX," l. 1737, p. I-241]}%
% This file DOES belong to format "texip."
\catcode`\@ = 11
\newbox\@ReduceToStrutBox
\def\ReduceToStrut #1{% 
    \setbox\@ReduceToStrutBox = \hbox{#1}%
    \vrule height \ht\@ReduceToStrutBox
           depth  \dp\@ReduceToStrutBox
           width 0pt
}
\catcode`\@ = 12