[texhax] how to use package

[Philip TAYLOR]

Wanwan, there were many errors in your code fragment,
but I think that the heart of the problem was a failure
to understand that \myfont is a parameterless macro.
The following shews how \myfont can be successfully
used, and if you want a parameterised version,
\MyFont is an example.

Philip Taylor
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\documentclass {minimal}

%\ProvidesPackage{mypackage}

\font \tt = cmtt10
\newfont{\myfont}{cmss10}
\def \MyFont #1{{\myfont #1}}

\renewcommand{\AA}{{\char221}}
\newcommand{\AB}{{\char222}}
\newcommand{\AC}{{\char223}}

\begin {document}

and I using it in my tex

%\usepackage{mypackage}

my question is how can I use command like

\begingroup \myfont a\AA b\AB c\AC \endgroup

Using command \begin{myfont} a\AA b\AB c\AC

\end{myfont} is working well but not {\tt \string \newfont} ?

Here is {\tt \string \MyFont} in use :
     \MyFont {a\AA b\AB c\AC}

anybody pls
\end {document}