How to edit Tkinter Minimize, Maximize, and Close Buttons

[menator01]

From the link I provided, I don't think you can directly edit the titlebar as it's managed by the systems window manager.

Probably best option is to use root.resizable(False, False)

A way to detect an open window. Not elegant but works

import tkinter as tk 

root = tk.Tk()
root.minsize(400,200)

def window():
    top = tk.Toplevel(None)
    top.geometry('+300+300')
    if top.winfo_exists():
        label.config(text='Window is open')
    top.protocol('WM_DELETE_WINDOW', lambda: change(top))


def change(top):
    label.config(text='Window is closed')
    top.destroy()

label = tk.Label(root, text='Window is closed')
label.pack()

btn = tk.Button(root, text='Open Window', command=window)
btn.pack(pady=10)

root.mainloop()