Windows 11's taskbar added a new child window that overrides the older non animated, non centered tasks list child container. I was playing with it, and I could insert my application inside the new taskbar window, just exactly where the old task list was (now hidden in Win11), but mine still shows as background, yaaay. So (as you can see in the picture above), this can be updated when shell messages are detected, like adding or removing windows from taskbar, and adjust its size accordingly. However, since it is a hacky method, and even if it works, it shows some annoying glitches on some circumstances, but I guess they're few. Hopefully, they will be no problem for many of us who likes to have the new Windows 11's taskbar skinned. And about Windows 10 taskbar, I tried something similar, but as it still uses the older task list window, it can't be painted behind them, I tried, and it worked for a moment, then it is repainted and everything (skin) is erased, or sometimes, the area