Tkinter modules

[Raspithon]

I have a raspberry pi and i a entry box from a raspberry pi book.
Here is my program code:

#! usr/bin/ env python
from tkinter import *
window = Tk()
_____________________________________________________________________________________________________
And here is the bit i am having problems with:

def dialog() :
box.showinfo('Greetings',Welcome')
_____________________________________________________________________________________________________

I am particularly having problems with the coding in the previous section " box.showinfo "
_____________________________________________________________________________________________________

If this helps you, the error says " NameError: global name 'box' is not defined
Raspithon

[KenT]

something like this:

import tkMessageBox

tkMessageBox.showwarning(.....

http://effbot.org/tkinterbook/tkinter-s ... ialogs.htm for examples