Suppose i have two toolwndows(toolwibndow1,toolwindow2) in my sample application.
Float the toolwindow1.
Float the toolwindow2.
Now toolwindow1 should be the parent or the owner of the toolwindow2 which means toolwindow2 should always be at the top oof toolwindow1.
As we can easily implement in the wpf windows concept by setting the owner of the wpf window eith other wpf window.