Re: [PATCH 0/1] MR3416: ieframe: Forward WM_PAINT messages to the document host and all its child windows.

[Torge Matthies (＠tmatthies)]

On Wed Jul 26 14:52:43 2023 +0000, Jinoh Kang wrote:
> > Emulate this protection for the trivial case of an
>
> InvalidateRect(...); call on the parent window.
> I believe this trivial case should already be handled by the
> `WM_CLIPCHILDREN` flag of the iexplore frame window and the shell
> embedding window.

The `WM_CLIPCHILDREN` flag is what caused this problem in the first place. The window having the `WM_CLIPCHILDREN` flag is prevented from drawing over its children, but the parent/ancestor windows of that window are not. However the browser window does not care and is immune to being painted over anyway.