Where to find tutorial to add event and property into a usercontrol?

Hi, Kirupa
Thanks for your great work to help so many guys like me.this is a great website.
I just made myself a time waiting control in Blend 4, and i added storyBoard into this control so it can spinning when it loaded. What i want to do is adding two property into this control , StartSpin() and StopSpin(). that means i want to control its behavior.
but i don’t know what to do next in the code behind part. do you have any ideal ? or where to find some tutorial to learn how to do this. :genius:

the snapshot of my waiting control in the attachment.