<Window x:Class="WpfApplication1.Window1" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" Title="mouseMoveWithPointer" Height="400" Width="500"> <Canvas MouseMove="MouseMoveHandler" Background="Red"> <Ellipse Name="ellipse" Fill="LightBlue" Width="100" Height="100"/> </Canvas> </Window> //File:Window.xaml.cs using System; using System.Windows; using System.Windows.Controls; using System.Windows.Shapes; using System.Windows.Input; namespace WpfApplication1 { public partial class Window1 : Window { public Window1() { InitializeComponent(); } private void MouseMoveHandler(object sender, MouseEventArgs e) { // Get the x and y coordinates of the mouse pointer. Point position = e.GetPosition(this); double pX = position.X; double pY = position.Y; ellipse.Width = pX; ellipse.Height = pY; } } }