It doesn't seem to be in Publisher 2000.

Notepad will open html files.
You may want to get a better Notepad than Microsoft's.  Notepad+ is an
improvement and can be found at:

http://www.mypeecee.org/rogsoft/

fwiw, it's best practice to match the post subject to the post question.

Also this information is available at http://www.publishermvps.com .

Version 2002 introduced the ability to open an html file (still present in
2003). However Publisher is not an html editor nor a web design tool. So one
has to keep this "ability" in context.

For example if you browsed to a web page, say for example www.cnn.com and
did File, Save and saved the html file locally, then opened that html file
in Pub 2002/2003, you may or may not get an accurate outcome. And all you
can do is move the objects present, you can't access html code.

There was a specific reason this ability was introduced in 2002, one which
has nothing to do with my example above, it was for a Publisher specific
reason (aka function). And it's a long story I won't go into now. It's
demise was clear by version 2003, and I expect it to be purged from the
product in the next release next year. As such I don't know that the next
release will retain the ability to open an html file.

David Bartosik - [MSFT MVP]
www.publishermvps.com
www.davidbartosik.com