I came across the problem that I want to have a (initially) fullscreen window which sometimes should be resizeable and sometimes not. But I found that (on windows) when I make it unresizeable it changes its size to fill the complete window including the taskbar which I don't want it to do. I want it to stay the size it initially was when I have set it zoomed (obviously).
Reproducable example:
from tkinter import Tk
root=Tk()
root.state('zoomed') #until here is everything normal
root.resizable(False,False) #here taskbar gets hidden
root.mainloop()
Finally,I got this,Is this what you want?
from tkinter import *
def SetSize():
width, height, X_POS, Y_POS = root.winfo_width(), root.winfo_height(), root.winfo_x(), root.winfo_y()
root.state('normal')
root.resizable(0,0)
root.geometry("%dx%d+%d+%d" % (width, height, X_POS, Y_POS))
root=Tk()
root.state('zoomed') #until here is everything normal
root.after(100,SetSize)
root.mainloop()