\documentclass[12pt]{article}
\usepackage{arabtex}
\begin{document}

\setarab
 \vocalize
  \arabtrue
 \spreadtrue

\Large{\bf Vowels}
\vskip 10pt
\large{There are six vowels in Arabic: three short and three long.

<yaktub> is an example of the short vowel in action.

<qAtala> represents the long. Not that difficult is it?

\begin{arabtext}

%Multi-line Naskh scripts can be typeset here.
%
%Output will be from right to left.

\end{arabtext}

\end{document}