Re: [PATCH v3 0/2] MR8848: quartz: Preserve the current visibility in IVideoWindow::put_Style().

[Attila Fidan (＠atticf)]

That fails because the window gains WS_CLIPSIBLINGS after SetParent(0) on native but that doesn't happen on wine.

```
HWND hwnd = ...
HWND hwnd2 = ...
SetParent(hwnd, hwnd2);
SetWindowLongPtrW(hwnd, GWL_STYLE, WS_OVERLAPPEDWINDOW);
// no WS_CLIPSIBLINGS
SetParent(hwnd, 0);
// has WS_CLIPSIBLINGS on native but not wine
SetWindowLongPtrW(hwnd, GWL_STYLE, WS_OVERLAPPEDWINDOW);
// both native and wine have WS_CLIPSIBLINGS
```

I see wine forces WS_CLIPSIBLINGS when the parent is the desktop window in win32u/window.c:set_window_long but no such thing on NtUserSetParent.

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https://gitlab.winehq.org/wine/wine/-/merge_requests/8848#note_114181