\documentclass{article}
\usepackage{verbatim}
\newenvironment{myverbatim}{%
before \verbatim inside}{%
inside \endverbatim after}
\begin{document}
\section{verbatim}
Before
\begin{verbatim}
Inside
\amacro
More Inside
\end{verbatim}
After
Before \begin{verbatim} Inside1
Inside2
Inside3 \end{verbatim} [ignored after]
Before \begin{verbatim} Inside1
Inside2
% comment Inside \end{verbatim}
Before \begin{verbatim} Inside1
Inside2
\end {verbatim}
\section{comment}
Before
\begin{comment}
Inside
\end{comment}
After
Before
\begin{comment}
Inside
\end {comment}
After
Before \begin{comment}Inside1
Inside2
Inside3 \end{comment} [ignored after]
After
\section{myverbatim}
Before
\begin{myverbatim}
Inside
\end{myverbatim}
After
Before \begin{myverbatim}Inside1
Inside2
Inside3 \end{myverbatim} [ignored after]
After
\section{Defining}
%\newverbtext{\silly}"^%{ &~_\}}@ #"
%\section{Weird \silly}
\section{From File}
\verbatiminput{verbata.tex}
\end{document}