Button on Misc. Screen

How do I go about having a button execute on a misc. screen? I have added the button on the right list, and I usually use the AVANTBOUT action to get the button to work, but that action is only executed on an object driven screen.

I am not sure how to get the button to work when a user clicks on it. I have the 4GL down, just need to know what method will execute the 4GL logic.