Window in 2nd pgm?

I have a 5250 program that calls a second program that displays a 5250
window. I want the window from the second program to overlay the screen
from the first program. By default, I get the window on top of an
otherwise black screen. The window program is commonly used and works fine
elsewhere, so I'm convinced the issue is with the first program.


I've done this in the past, and I recall there was some DDS trick to
accomplish this. Can someone please refresh my memory?

Thanks