How to make a DraggableWindow top most control

[KevinMayo]

I am using the ESRI DraggableWindow to display all of my custom user controls.  It's great because it gives my app a consistent look and feel, but I haven't figured out how to control the z-index of the newly opened windows.  Every new window goes straight to the bottom of the stack.  I am showing the windows using the 'ToggleWindowVisibilityAction' in my xaml. 

Any ideas?

[JenniferNery]

DraggableWindow respects its position in the Grid. If your DraggableWindows share a position in the Grid, the last element goes on top.