VisualTreeHelper.HitTest Method (Visual, Point) (System.Windows.Media)

		' Respond to the left mouse button down event by initiating the hit test.
		Private Overloads Sub OnMouseLeftButtonDown(ByVal sender As Object, ByVal e As MouseButtonEventArgs)
			' Retrieve the coordinate of the mouse position.
			Dim pt As Point = e.GetPosition(CType(sender, UIElement))

			' Perform the hit test against a given portion of the visual object tree.
			Dim result As HitTestResult = VisualTreeHelper.HitTest(myCanvas, pt)

			If result IsNot Nothing Then
				' Perform action on hit visual object.
			End If
		End Sub

// Respond to the left mouse button down event by initiating the hit test.
private void OnMouseLeftButtonDown(object sender, MouseButtonEventArgs e)
{
    // Retrieve the coordinate of the mouse position.
    Point pt = e.GetPosition((UIElement)sender);

    // Perform the hit test against a given portion of the visual object tree.
    HitTestResult result = VisualTreeHelper.HitTest(myCanvas, pt);

    if (result != null)
    {
        // Perform action on hit visual object.
    }
}