pyglet: Transparent Window not working on Windows 11

Hi there! I see that in 1.5.20 you added experimental support for transparent windows / overlay. However, I can’t find anything in the official docs on how to set it up!

I have this as my code:

import pyglet

window = pyglet.window.Window(style=pyglet.window.Window.WINDOW_STYLE_OVERLAY)

label = pyglet.text.Label('Hello, World',
                          font_name='Times New Roman',
                          font_size=36,
                          x=window.width//2, y=window.height//2,
                          anchor_x='center', anchor_y='center')

@window.event 
def on_draw():
    window.clear()
    label.draw()

pyglet.app.run()

However, it looks like this when run:

Is there some other command I need to make the background Transparent?