[AccessD] Access 2007 Question

I was just reading Getz's article Transitioning Your Existing Access
Applications to Access 2007 (
<http://msdn2.microsoft.com/en-us/library/bb203849.aspx>
http://msdn2.microsoft.com/en-us/library/bb203849.aspx).  
 
There's a feature which allows you to get rid of the form resizing code
which fills the whole screen with your form based on the user's current
screen resolution using the Anchoring and Stretch Down and Across
properties.
 
The question is:  once you have done this to a form in an A2K3 mdb, can you
open with A2K3 and get the resizing?  Or do you need to save the mdb in A2K7
to get this to work?  
 
TIA
 
Rocky