AcrylicUI Gist - Round Corners

AcrylicUI_RoundCorners.cs

 #region Round Corners


        private void RoundCorners(bool _isWindows11)
        {
            if (_isWindows11)
            {
                var attribute = DWMWINDOWATTRIBUTE.DWMWA_WINDOW_CORNER_PREFERENCE;
                var preference = DWM_WINDOW_CORNER_PREFERENCE.DWMWCP_ROUND;
                DwmSetWindowAttribute(this.Handle, attribute, ref preference, sizeof(uint));
            }
            this.windowPanel1.RoundCorners = _isWindows11;
        }

        public enum DWMWINDOWATTRIBUTE
        {
            DWMWA_WINDOW_CORNER_PREFERENCE = 33
        }

        // The DWM_WINDOW_CORNER_PREFERENCE enum for DwmSetWindowAttribute's third parameter, which tells the function
        // what value of the enum to set.
        public enum DWM_WINDOW_CORNER_PREFERENCE
        {
            DWMWCP_DEFAULT = 0,
            DWMWCP_DONOTROUND = 1,
            DWMWCP_ROUND = 2,
            DWMWCP_ROUNDSMALL = 3
        }

        // Import dwmapi.dll and define DwmSetWindowAttribute in C# corresponding to the native function.
        [DllImport("dwmapi.dll", CharSet = CharSet.Unicode, SetLastError = true)]
        private static extern long DwmSetWindowAttribute(IntPtr hwnd,
                                                         DWMWINDOWATTRIBUTE attribute,
                                                         ref DWM_WINDOW_CORNER_PREFERENCE pvAttribute,
                                                         uint cbAttribute);

        #endregion