Latex Beamer Block: Increase border width [duplicate]

Possible Duplicate:
Can I have framed blocks in beamer?

Is it possible to increase the border width of a block? I have identified the following section of code as being responsible for the block layout:

\setbeamertemplate{block begin}{
\vskip.75ex
\usebeamerfont*{block title}\insertblocktitle
\end{beamercolorbox}%
{\ifbeamercolorempty[bg]{block body}{}{\nointerlineskip\vskip-0.5pt}}%
\usebeamerfont{block body}%
%\ifbeamercolorempty[bg]{block body}{\vskip-.25ex}{\vskip-.75ex}\vbox{}%
}
\setbeamertemplate{block end}{
\end{beamercolorbox}
}


However, the only things I can seem to change is foreground and background color, and shadow. But what I want to do is make a strong, colored border around the whole block. Is this possible?

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beamercolorbox does not have this option. The options for it are listed on pages 124-125 of the beamer manual. To get boxes with frames you can use TikZ or mdframed. –  Roelof Spijker Apr 10 '12 at 12:12

marked as duplicate by Gonzalo Medina, diabonas, Roelof Spijker, percusse, lockstepApr 10 '12 at 16:15

As an example, with TikZ you could create your own block environment to look something like this:

\documentclass{beamer}
\usepackage{tikz}
\usepackage{lipsum}
\usetheme{Warsaw}
\newsavebox\blockbox
\newenvironment{myblock}{%
\begin{lrbox}{\blockbox}%
\begin{minipage}{.9\textwidth}
}{
\end{minipage}
\end{lrbox}
\tikz\node[
fill=green!40!blue!20,
draw=red!30,
line width=10pt,
inner sep=7.5pt,
rounded corners,
outer sep=0pt,
]{\usebox\blockbox};
}
\begin{frame}
\begin{myblock}
\lipsum[1]
\end{myblock}
\end{frame}
\end{document}


Which looks like this:

You could modify the code to supply arguments to the environment that are passed on to the TikZ node that is drawn.

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