Newsgroups: comp.text.tex
Date: 1999/06/10

> that there exist a package named "ulem" that enables 1) wavy underline,
> 2) strike-out and 3) crossing-out text.  I wonder if there is any
> package
> doing 4) double-underline, 5) dotty underline and 6) crossing underline
> 4) ========= 5)  .................... 6) / / / / / / / / / / / / /

4) Double underline is already defined (\uuline).

5) Try

\newcommand{\dotuline}{\bgroup \markoverwith{\lower .4ex\hbox{.}}\ULon}

Donald Arseneau