How to create a templated composite control with a behavior

[kyoshawn]

I'm trying to create a templated composite control that would work in a similar fashion as the "PasswordRecovery" control of ASP.Net. By that, I mean that the user can define its own template but, by using pre-defined controls ID, it defines which field is, say the e-mail address, and which button is the one to send the e-mail. I've tried to look at the documentation for templated web server controls, but I can't find anything talking about adding a behavior to those controls.Alternatively, is there a way to change the behavior of the PasswordRecovery completely? I would like to send an e-mail with a one-time URL to change the password instead of the common behavior of that control.