QUESTION Another plugin example needed please

[cobber]

Morning all

Just read the documentation for the creation of a plugin (hello world)

I think I get general idea, however it would be good to download and play with other simple examples so I can get a better grasp.

In the hello world example it says that a I add a menu to the side bar using the following.

Code:

# add a link in the admin tab 'theme'
add_action('theme-sidebar','createSideMenu',array($thisfile,'Hello World description'));

however no menu item appears, or have I misunderstood?

many thanks