%% 
%%  The LaTeX Graphics Companion, 2ed (first printing May 2007)
%% 
%%  Example 5-13-33 on page 295.
%% 
%%  Copyright (C) 2007 Michel Goossens, Frank Mittelbach, Denis Roegel, Sebastian Rahtz, Herbert Vo\ss 
%% 
%%  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.
%% 

\documentclass{ttctexa}
\pagestyle{empty}
\setcounter{page}{6}
\setlength\textwidth{135.83385pt}
\StartShownPreambleCommands
\usepackage{pstricks}
\StopShownPreambleCommands
\begin{document}
\SpecialCoor
\begin{pspicture}[showgrid=true](4,3)
 \pscustom[linewidth=1.5pt]{%
  \arrows{|->}
  \code{
     80 140 5 5 ArrowA    % leaves 80 140 on stack
     30 -30 110 75 ArrowB % leaves 30 -30 105.41 68.986
     curveto}}            % curve for three points
 \psline[linestyle=dashed]%
    (5pt,5pt)(80pt,140pt)(30pt,-30pt)(110pt,75pt)
 \uput[0](80pt,140pt){(80pt,140pt)}
 \uput[0](30pt,-30pt){(30pt,--30pt)}
\end{pspicture}
\end{document}