AuraPhotoViewer.ResizeableWindow.WmGetMinMaxInfo C# (CSharp) Method

        private void WmGetMinMaxInfo(IntPtr hwnd, IntPtr lParam)
        {
            MINMAXINFO mmi = (MINMAXINFO)Marshal.PtrToStructure(lParam, typeof(MINMAXINFO));

            // Adjust the maximized size and position to fit the work area of the correct monitor
            int MONITOR_DEFAULTTONEAREST =0x00000002;
            IntPtr monitor = MonitorFromWindow(hwnd, MONITOR_DEFAULTTONEAREST);

            if (monitor != IntPtr.Zero)
            {
                MONITORINFO monitorInfo = new MONITORINFO();
                GetMonitorInfo(monitor, monitorInfo);
                RECT rcWorkArea = monitorInfo.rcWork;
                RECT rcMonitorArea = monitorInfo.rcMonitor;
                mmi.ptMaxPosition.x = Math.Abs(rcWorkArea.left - rcMonitorArea.left);
                mmi.ptMaxPosition.y = Math.Abs(rcWorkArea.top - rcMonitorArea.top);
                mmi.ptMaxSize.x = Math.Abs(rcWorkArea.right - rcWorkArea.left);
                mmi.ptMaxSize.y = Math.Abs(rcWorkArea.bottom - rcWorkArea.top);

                // Convert pixel sizes based on current DPI settings.
                // Window.MinHeight/MinWidth are 1/96th of an inch.
                PresentationSource presentationSource = PresentationSource.FromVisual(this);
                if (presentationSource != null)
                {
                    if (presentationSource.CompositionTarget != null)
                    {
                        Point minSize = presentationSource.CompositionTarget.TransformToDevice.Transform(new Point(MinWidth, MinHeight));
                        mmi.ptMinTrackSize.x = (int)minSize.X;
                        mmi.ptMinTrackSize.y = (int)minSize.Y;
                    }
                }
            }

            Marshal.StructureToPtr(mmi, lParam, true);
        }