%% 
%%  A DANTE-Edition example
%% 
%%  Example 11-03-12 on page 129.
%% 
%%  Copyright (C) 2011 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{177.70511pt}
\setlength\parindent{0pt}

\usepackage{pstricks,pst-plot}

\begin{document}
\begin{pspicture}[showgrid](3,3)
 \pscustom{%
   \psplot{0}{3}{x 180.0 mul 1.5 div
     sin 1.5 mul 1.5 add}
   \gsave
     \psline(3,3)(0,3)% is _not_ drawn
     \fill[fillcolor=lightgray,fillstyle=solid]
   \grestore }
\end{pspicture}
\end{document}