VS 2010 Adding textbox.textchanged code to multiple controls

I have a form with three panels each having about 25 text boxes. Is there any way I can add code to the textchanged event for all 75 text boxes without having to go to each control and double click it?

I want to set the Boolean variable "Changed" to true whenever the text in any textbox is changed.

Thanks for any help you can offer.

Richard