ModernWPF.Internal.LegacyBorderManager.HandleWindowPosChanged C# (CSharp) Method

        private void HandleWindowPosChanged(IntPtr hwnd, IntPtr lParam)
        {
            var windowpos = (WINDOWPOS)Marshal.PtrToStructure(lParam, typeof(WINDOWPOS));
            //Debug.WriteLine("Chrome {0} windowpos flags {1}.", _borderWindow.Id, ClearUndefined(windowpos.flags));

            if ((windowpos.flags & SetWindowPosOptions.SWP_NOSIZE) != SetWindowPosOptions.SWP_NOSIZE)
            {
                SetRegion(hwnd, windowpos.cx, windowpos.cy, false);
            }

            if (_borderWindow != null)
            {
                // The override is for a window with owner and the owner window minimizes.
                // In this case the window is hidden with SWP_HIDEWINDOW but not actually minimized
                // so the code detects the show/hide flags here as the override
                if ((windowpos.flags & SetWindowPosOptions.SWP_HIDEWINDOW) == SetWindowPosOptions.SWP_HIDEWINDOW)
                {
                    _hideOverride = true;
                }
                if ((windowpos.flags & SetWindowPosOptions.SWP_SHOWWINDOW) == SetWindowPosOptions.SWP_SHOWWINDOW)
                {
                    _hideOverride = false;
                }
                if (_contentShown)
                {
                    _borderWindow.RepositionToContent(hwnd, _hideOverride);
                }
            }
        }