Re: [PATCH 0/1] MR6617: comctl32: Use correct clipping region when handling themed WM_NCPAINT in listview.

[Zhiyi Zhang (＠zhiyi)]

Zhiyi Zhang (@zhiyi) commented about dlls/comctl32/listview.c:
> if (!theme || !(exstyle & WS_EX_CLIENTEDGE))
>         return DefWindowProcW (infoPtr->hwndSelf, WM_NCPAINT, (WPARAM)region, 0);
>
> -    GetWindowRect(infoPtr->hwndSelf, &r);
> +    GetClientRect(infoPtr->hwndSelf, &r);
> +    cliprgn = CreateRectRgn(r.left, r.top, r.right, r.bottom);
> +    if (region > (HRGN)1)
> +    {
> +        CombineRgn(cliprgn, region, cliprgn, RGN_DIFF);
> +        dc = GetDCEx(infoPtr->hwndSelf, cliprgn, DCX_USESTYLE | DCX_WINDOW | DCX_INTERSECTRGN);
> +    }
> +    else
> +        dc = GetDCEx(infoPtr->hwndSelf, cliprgn, DCX_USESTYLE | DCX_WINDOW | DCX_EXCLUDERGN);

Could you add some tests?

-- 
https://gitlab.winehq.org/wine/wine/-/merge_requests/6617#note_84314