Help with TextField

I made a Program with a textfield and some things with them.

from anygui import *
app = Application()
win = Window(title='kioii')
win.size = 107, 31
app.add(win)

box = TextField(height='25', width='100')
win.add(box, right=3, top=3, bottom=3, left=3)

def com(**kwds):
    if box == 'qwqq':
        import os
        os.system('C://"Program Files"//"Internet Explorer"//IEXPLORE.EXE')

link(box, com)
app.run()




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