Can I change the title bar in Tkinter?

Most will know there is an error when using the 'move_window' method used above; I found a fix that gets the exact position of the mouse and moves with that rather than from the corner:

    def get_pos(event):
        xwin = app.winfo_x()
        ywin = app.winfo_y()
        startx = event.x_root
        starty = event.y_root

        ywin = ywin - starty
        xwin = xwin - startx


        def move_window(event):
            app.geometry("400x400" + '+{0}+{1}'.format(event.x_root + xwin, event.y_root + ywin))
        startx = event.x_root
        starty = event.y_root


        app.TopFrame.bind('<B1-Motion>', move_window)
    app.TopFrame.bind('<Button-1>', get_pos)

Yes it's possible. You can use the overrideredirect() method on the root window to kill the title bar and the default geometry settings. After that, you need to rebuild all those methods from scratch to set it back up like you want. Here's a small working example with minimal functionality:

root = Tk()

def move_window(event):
    root.geometry('+{0}+{1}'.format(event.x_root, event.y_root))

root.overrideredirect(True) # turns off title bar, geometry
root.geometry('400x100+200+200') # set new geometry

# make a frame for the title bar
title_bar = Frame(root, bg='white', relief='raised', bd=2)

# put a close button on the title bar
close_button = Button(title_bar, text='X', command=root.destroy)

# a canvas for the main area of the window
window = Canvas(root, bg='black')

# pack the widgets
title_bar.pack(expand=1, fill=X)
close_button.pack(side=RIGHT)
window.pack(expand=1, fill=BOTH)

# bind title bar motion to the move window function
title_bar.bind('<B1-Motion>', move_window)

root.mainloop()

I found a way of making the title bar black using ctypes: (win11 only)

Tkinter dark title bar example:

import ctypes as ct


def dark_title_bar(window):
    """
    MORE INFO:
    https://docs.microsoft.com/en-us/windows/win32/api/dwmapi/ne-dwmapi-dwmwindowattribute
    """
    window.update()
    DWMWA_USE_IMMERSIVE_DARK_MODE = 20
    set_window_attribute = ct.windll.dwmapi.DwmSetWindowAttribute
    get_parent = ct.windll.user32.GetParent
    hwnd = get_parent(window.winfo_id())
    rendering_policy = DWMWA_USE_IMMERSIVE_DARK_MODE
    value = 2
    value = ct.c_int(value)
    set_window_attribute(hwnd, rendering_policy, ct.byref(value),
                         ct.sizeof(value))

I searched almost a year for a solution!