Need Help!!!About the difference between smartgwt and gwt for component "Window"

[JIE SUN]

Hi guys:

I had difficult to set up a smartgwt window as sam functionality as
the one in gwt.
Basically, I just need to click a button, and a panel pops up,
meanwhile all other components at background will be greyed out.
However, when I use the component "window" in smartgwt, it looks like
does not have that functionality and i still can edit the background
components.
I have tried just create the window from gwt, it does not work since
all the background component created from smartgwt, and the window
created from gwt even pops up, but u cannnot edit it and even click
it.

Any ideas? or suggestions?

Many thinks guys!!!