How to Cancel Window Close Event in Tk (tkinter)

import tkinter as tk
from tkinter import messagebox


def delete_window():
    # Function called when the user tries to close the window.
    close = messagebox.askyesno(
        message="Are you sure you want to close the application?",
        title="Confirm Exit"
    )
    if close:
        root.destroy()


root = tk.Tk()
# Replace Tk's default procedure with our own function to close the window.
root.protocol("WM_DELETE_WINDOW", delete_window)
root.mainloop()

# Always disable window closing.
root.protocol("WM_DELETE_WINDOW", lambda: None)