Default button and display panel window

Here’s my simple code:


display window "sheet" attached to window "main"

On the window “sheet” there is a single button. When the sheet displays, the button doesn’t display the “default” behavior (glow blue and pulsate). I’d like it to do so.

How can I accomplish that?

I’ve searched the archives to no avail.

In Interface Builder, set the “Key Equiv” to Return (\R).