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Common/DTS.Common/Utils/MouseUtils.cs

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+using System;
+using System.Runtime.InteropServices;
+using System.Windows;
+using System.Windows.Media;
+
+namespace DTS.Common.Utils
+{
+    public class MouseUtilities
+    {
+        [StructLayout(LayoutKind.Sequential)]
+        private struct Win32Point
+        {
+            public int X;
+            public int Y;
+        };
+
+        [DllImport("user32.dll")]
+        private static extern bool GetCursorPos(ref Win32Point pt);
+
+        [DllImport("user32.dll")]
+        private static extern bool GetPhysicalCursorPos(ref Win32Point pt);
+
+        [DllImport("user32.dll")]
+        private static extern bool ScreenToClient(IntPtr hwnd, ref Win32Point pt);
+
+        public static Point GetMousePosition(Visual relativeTo)
+        {
+            var mouse = new Win32Point();
+            GetCursorPos(ref mouse);
+
+            var presentationSource =
+                (System.Windows.Interop.HwndSource)PresentationSource.FromVisual(relativeTo);
+
+            var factor = 2D - presentationSource.CompositionTarget.TransformToDevice.M22;
+
+            ScreenToClient(presentationSource.Handle, ref mouse);
+
+            var transform = relativeTo.TransformToAncestor(presentationSource.RootVisual);
+
+            var offset = transform.Transform(new Point(0, 0));
+            if (factor > 0)
+            {
+                offset.Y = offset.Y + offset.Y * (presentationSource.CompositionTarget.TransformToDevice.M22 - 1);
+            }
+            return new Point(mouse.X - offset.X, mouse.Y - offset.Y);
+        }
+
+
+    }
+}