new window not change the focus state

[York]

Hi, there,

While using Tkinter. I want to generate a window -- Tk() or Toplevel(), but 
I'd like not to change the focus to the new window, so the new window can 
only display some message but won't grab any keyboard events, users can 
keep on typing in the wordprocessors they are using. Is that possible?

Chees,

York