Please, i need help!!

I have an MFC dialog based application, it has a dialog with some edit controls, i need to know when the user press an "enter key" or an "arrow up" or an "arrow down" in a specific edit control. I suposse i have to use the OnKeyUp event, but I don´t know how to do it, when i search this message in the classwizard i didn't find it
Does anybody have an example?

I hope you understand my english, thanks anyway!!

Saludos
Aida