If I wanted to add a button to the option area for a plug-in?

[tenants]

There are a few things available to add to the your plug-ins:

textbox, spinbox, callback, on/off, radio, select, checkbox, template

But if I wanted to add a simple button (just to send a request and wait for the response), for instance, one that goes and does actionCacheRebuild() how would I do this?

All I want to do is add the button to the options area for a plug-in, I've been downloading lots of plug-ins to see if/how anyone else has done it, but haven't found an example yet

My guess is, I do this with a php call back, I'm not quite sure how yet ...