windows within windows

[Schwartz, Cynthia L]

I have a MainWindow and within that I have a dockingWindow extended off of 
window and a menuBar.  It is the classic beginning of a desktop app.
Since the menuBar takes some space at the top the dockingWindow is not fitting 
in the MainWindow (at the bottom).
I based the dockWindow on Oliver's post about a month ago and the menuBar is 
based on the kitchen sink menus (both bxml).

I based how I display them all  on the Windows tutorial example so simply 
open(display).

I am wondering is there a way to manage the dockingWindow layout?

Thanks,
Cynthia