\makeatletter

\long\def\tciboxit#1{%
  \begingroup
     \setbox0=\hbox{#1}%
     \dimen0=\ht0 
     \advance\dimen0 by \dp0%
     \dimen1=\dimen0
     \divide\dimen1 by 65536
     \dimen2=\wd0
     \divide\dimen2 by 65536
     \dimen3=\dp0
     \divide\dimen3 by 65536
     \hbox{%
        \special{language "Scientific Word";
                 type "greybox";
                 greyscale .95;
                 height \number\dimen1 pt;
                 width \number\dimen2 pt; 
                 depth \number\dimen3 pt;}%
        \copy0% 
     }%
  \endgroup%
}%

\newsavebox{\gray@box}%
\newdimen\gray@space
\long\def\Beginboxitpara{%
\gray@space=\fboxsep \advance\gray@space by -\fboxrule
\par\prevdepth=-1000pt\vskip 0.5\baselineskip\noindent
\setbox\gray@box=%
\hbox\bgroup 
        %\vrule width \fboxrule
        \vtop\bgroup 
            %\hrule
            \vbox\bgroup
                \kern\gray@space
                   \hbox\bgroup
                        \kern\gray@space
                        \vtop\bgroup
                   \hsize=\linewidth\advance\hsize-2\fboxsep\noindent
                   \ignorespaces}
\def\Endboxitpara{%
                             \egroup
                        \kern\gray@space
                        \egroup
                   \kern\gray@space
                   \egroup 
                   %\hrule
             \egroup
             %\vrule width \fboxrule
     \egroup
     \tciboxit{\box\gray@box}%
     \vskip 0.5\baselineskip
\par}

\newenvironment{boxitpara}[1]{\Beginboxitpara{#1}}{\Endboxitpara}
\newenvironment{boxitpara*}[1]{\Beginboxitpara{#1}\hbox to\hsize{}}%
{\Endboxitpara}


\newenvironment{GrayBox}
   {\begin{boxitpara}{.93 setgray fill}% 
       \parindent=0pt
       \parskip = 5pt
   }%
   {\end{boxitpara}}

\def\BBox{                    % this added by chris
   \setbox 0 = \hbox\bgroup}  % this added by chris
\def\EBox{\egroup             % this added by chris
    \tciboxit{\box 0 }}       % this added by chris


\makeatother