centering my box

[fuston05]

i made a box and defind the pixel sizeand cant seem to make it pop up centered, i want it to be full screen and centered. its coming up the correct size, but its position is 1/2 way off the screen, heres what i have so far.

Code:

from Tkinter import *


root = Tk()
root.geometry('1024x768+512+384')
lab = Label(root, text =  'hi, this is my box')
button = Button(root,text = 'button')











button.pack()
lab.pack()
root.mainloop()