[Tutor] how to enable overrideredirect

[brindly sujith]

from Tkinter import *
import tkMessageBox
import tkFileDialog,os
def quit():
	if tkMessageBox.askokcancel("Quit","DO u really want to quit"):
		root.destroy()

def fiopen():
	file1 = tkFileDialog.askopenfile(parent=root,mode='rb',title='Choose a file')
	os.system("openoffice %s"%file1.name)
	
root=Tk()
label=Label(root,text="Welcome to PC-FREE PROJECTOR")
label.pack()
button=Button(root,text="select",command=fiopen)
button.pack()
button1=Button(root,text="Exit",command=quit)
button1.pack()
root.overrideredirect(True)
root.geometry('%dx%d+%d+%d' % (root.winfo_screenwidth(),
                               root.winfo_screenheight(),
                               0, 0))
root.lift()
root.mainloop()


the above program is my application

please execute this program...

while executing this program

initially a window will open....after that the buttons 'select'
and 'exit' is not working...

i checked out by disabling root.overrideredirect(True) line in
the program...then its working

what is the problem here...i want this program to work perfectly

plz do reply me

thanx
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