I need to do a dotted frame, something this one: 
Is it possible to do?
[Tex/LaTex] Dotted frame around the text
framed
Related Solutions
I would define my own listings environment (\lstnewenvironment) which draws the box using TikZ around the listing:
\documentclass{article}
\usepackage{listings}
\usepackage{tikz}
\newlength{\cornerlength}
\setlength{\cornerlength}{1cm}
\tikzset{listingborder/.style={thick}}
\makeatletter
\lstnewenvironment{mylisting}[1][]{%
\lstset{#1}%
\setbox0\hbox\bgroup\color@setgroup
}{%
\color@endgroup\egroup
\begin{tikzpicture}
\node (L) [text width=\linewidth] {%
\usebox{0}%
};
\draw [listingborder]
(L.north west)
-- ([xshift=-\cornerlength]L.north east)
-- ([yshift=-\cornerlength]L.north east)
-- (L.south east)
-- (L.south west)
-- cycle;
\draw [listingborder]
([yshift=-\cornerlength]L.north east)
-| ([xshift=-\cornerlength]L.north east);
\end{tikzpicture}%
}
\makeatother
\begin{document}
\begin{mylisting}[language=tex,basicstyle=\ttfamily]
\lstnewenvironment{mylisting}[1][]{%
\lstset{#1}%
\setbox0\hbox\bgroup\color@setgroup
}{%
\color@endgroup\egroup
\begin{tikzpicture}
\node (L) [text width=\linewidth] {%
\usebox{0}%
};
\draw [listingborder]
(L.north west)
-- ([xshift=-\cornerlength]L.north east)
-- ([yshift=-\cornerlength]L.north east)
-- (L.south east)
-- (L.south west)
-- cycle;
\draw [listingborder]
([yshift=-\cornerlength]L.north east)
-| ([xshift=-\cornerlength]L.north east);
\end{tikzpicture}%
}
\end{mylisting}
\end{document}
You still need to add the waved line at the bottom. Also note that usually you can wrap the node around the environment content be replacing \node {..}; with \node \bgroup and \egroup;, however, this didn't worked for the listings environment. Most likely some of the verbatim trickery causes issues. (This is funny because verbatim should work inside a TikZ node)
Here's a method that doesn't require loading TikZ explicitly. (Although mdframed uses tikz behind the scenes. This is, however, the package for framing boxes.
\documentclass{article}
\usepackage[framemethod=TikZ]{mdframed}
\usepackage{lipsum}
\begin{document}
\begin{mdframed}[roundcorner=10pt]
\lipsum[1]
\end{mdframed}
\end{document}
If you don't even want to use TikZ as a backend, you could use PSTricks:
\documentclass{article}
\usepackage[framemethod=PStricks]{mdframed}
\usepackage{lipsum}
\begin{document}
\begin{mdframed}[roundcorner=10pt]
\lipsum[1]
\end{mdframed}
\end{document}
[Note this doesn't seem to be working for me at the moment.]
Best Answer
You can use
TikZ:Zooming in your example picture reveals that you might wish a “dashed” instead of a “dotted” frame. In this case, just replace
dottedwithdashed: