new toolbar command?

Hi all,

I managed to create a plugin to add some custom toolbar buttons, now I need to make those buttons do something when clicked. All they will need to do is surround the text in a span like so: <span class="foo">text here</span>.

Also, how do I load the custom CSS that matches my classes and make it apply to the content of the fckeditor.

Also, is it possible to have buttons and a toolbar that are not a fixed size. With HTMLArea, I was able to do this easily by hacking the code, but haven't had success with doing the same with fckeditor.

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bye,
pabs