Window Corner Test
Rounded corners of window on Windows 11 applicable to WPF.
Requirements
- .NET 5.0
- Windows 11 (10.0.22000.x)
Overview
To work with rounded corners introduced in Windows 11, check the official explanation on this feature.
(This document is dated on 10/02/2020 but actually it was committed on 07/17/2021.)
The underlying values of key constants, DWMWA_WINDOW_CORNER_PREFERENCE and DWM_WINDOW_CORNER_PREFERENCE enumeration, can be found in dwmapi.h included in Windows Insider Preview SDK.
When rounded corners are applied to a window, a gray outline is automatically added.
On version 10.0.22000.100, anti-aliasing is not applied to the rounded corners and they show noticeable jaggies (except those of standard title bar).
(DPI: 175%)
On version 10.0.22000.120, anti-aliasing is applied and the jaggies are fixed.
