Setting Dialog Box Captions ??

[Peter Moscatt]

How does one place a "Title" in the master frame ?

For example, if I was to have the following code:

from Tkinter import *
root=Tk()
w=Label(root, text="Hello World")
w.pack()
root.mainloop()

And now I wanted to place "This is My Test Dialog" as the caption for the 
root frame - how would I doo this ?

Regards
Pete