Writing a custom storage engine

[Homam S.A.]

I've been contemplating writing my own custom storage
engine for MySQL.

I haven't found much documentation on the subject
besides these articles:

http://netmirror.org/mirror/mysql.com/tech-resources/articles/creating-new-storage-engine.html

http://dev.mysql.com/tech-resources/articles/storage-engine/part_1.html

However, they refer to an example storage engine
written for demo purposes that should be found under
the "/sql/examples" folder in the source distribution.

I downloaded the lates Win32 source (4.1.10a), but I
couldn't find a "/sql/examples" folder. I only found
an "/examples" folder, but it doesn't contain any demo
storage engine.

Where can I find the source for the example storage
engine?

And where can I find other documentation that provides
pointers on the subject?

Thanks!

Homam