Adding helper class for getting the right bounds for screens

src/modules/Projects/ProjectsEditor/Utils/MonitorHelper.cs

@@ -0,0 +1,49 @@
+// Copyright (c) Microsoft Corporation
+// The Microsoft Corporation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+using System;
+using System.Collections.Generic;
+using System.Drawing;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Windows.Forms;
+
+namespace ProjectsEditor.Utils
+{
+    internal sealed class MonitorHelper
+    {
+        internal static List<Rectangle> GetDpiUnawareScreenBounds()
+        {
+            List<Rectangle> screenBounds = new List<Rectangle>();
+
+            var primaryScreen = System.Windows.Forms.Screen.PrimaryScreen;
+            GetDpiOnScreen(primaryScreen, out uint dpiXPrimary, out uint dpiYPrimary);
+
+            foreach (var screen in System.Windows.Forms.Screen.AllScreens)
+            {
+                GetDpiOnScreen(screen, out uint dpiX, out uint dpiY);
+
+                screenBounds.Add(new Rectangle((int)(screen.Bounds.Left * 96 / dpiXPrimary), (int)(screen.Bounds.Top * 96 / dpiYPrimary), (int)(screen.Bounds.Width * 96 / dpiX), (int)(screen.Bounds.Height * 96 / dpiY)));
+            }
+
+            return screenBounds;
+        }
+
+        private static void GetDpiOnScreen(Screen screen, out uint dpiX, out uint dpiY)
+        {
+            var point = new System.Drawing.Point(screen.Bounds.Left + 1, screen.Bounds.Top + 1);
+            var hmonitor = NativeMethods.MonitorFromPoint(point, NativeMethods._MONITOR_DEFAULTTONEAREST);
+
+            switch (NativeMethods.GetDpiForMonitor(hmonitor, NativeMethods.DpiType.EFFECTIVE, out dpiX, out dpiY).ToInt32())
+            {
+                case NativeMethods._S_OK: break;
+                default:
+                    dpiX = 96;
+                    dpiY = 96;
+                    break;
+            }
+        }
+    }
+}