disable highlighting buttons?

Is there a way to disable or control highlighting buttons? With this I mean the blue halo that shows around the button. ASS Reference mentions that ‘highlight’ should not be used but I’m not sure whether they are referring to the same as what I intend. I tried the following code but it seems to get ignored without error:

tell button "stopBut" of theObject to highlight

You mean like when you tab from one control to another? There is an option in Interface Builder to set the “first responder” (i.e. - the control that is selected when the window opens). Or are you needing to do this “on the fly?”

Yes, I would either need it on the fly or completely disable it…