A line which monitors the mouse entering its area

     
<Window x:Class="WpfApplication1.MainWindow"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="WpfApplication1" Height="352" Width="334" WindowStartupLocation="CenterScreen">
    <StackPanel>
      <Line Name ="SimpleLine" X1 ="0" X2 ="50" Y1 ="0" Y2 ="50" 
            Stroke ="DarkOliveGreen" StrokeThickness ="5"
            ToolTip ="This is a line!" MouseEnter ="SimpleLine_MouseEnter"/>
    </StackPanel>
</Window>
//File:Window.xaml.vb
Imports System
Imports System.Collections.Generic
Imports System.Text
Imports System.Windows
Imports System.Windows.Controls
Imports System.Windows.Data
Imports System.Windows.Documents
Imports System.Windows.Input
Imports System.Windows.Media
Imports System.Windows.Media.Imaging
Imports System.Windows.Shapes


Namespace WpfApplication1
  Public Partial Class MainWindow
    Inherits System.Windows.Window

    Public Sub New()
      InitializeComponent()
    End Sub
    Protected Sub SimpleLine_MouseEnter(sender As Object, args As MouseEventArgs)
      Me.Title = [String].Format("Mouse entered at: {0}", args.GetPosition(SimpleLine))
    End Sub
  End Class
End Namespace

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1.	MouseDown action on Line
2.	Hit Result Behavior
3.	Button PreviewMouseLeftButtonDown action and MouseLeftButtonDown action
4.	Grid MouseLeftButtonDown action and PreviewMouseLeftButtonDown action
5.	Detect whether the mouse button is pressed or released using the MouseButtonState property.
6.	Handler MouseLeftButtonDown and MouseLeftButtonUp events
7.	Make an object follow the mouse pointer as it moves on the screen.
8.	Use Mouse.AddPreviewMouseDownHandler(myEllipse, PreviewMouseDownEllipse);
9.	Use Mouse.AddMouseDownHandler(myEllipse, MouseDownEllipse);
10.	Use Mouse.PreviewMouseDown /Mouse.MouseDown Attribute from Grid element
11.	Mouse Position and TranslateTransform
12.	Mouse Position
13.	Get mouse position with Mouse.GetPosition
14.	Replease mouse with Mouse.Capture(null)
15.	Retrieving the mouse position relative to controls on a Window
16.	Mouse cursor override and clear
17.	Check the mouse event source
18.	Use the Mouse Wheel action methods that are defined by the IScrollInfo interface
19.	Change control background in mouse enter and leave
20.	Use EventSetter to add mouse event handler
21.	Mouse.LostMouseCaptureEvent
22.	Use Mouse.Capture to let a Control capture an event
23.	Point Hit Test

A line which monitors the mouse entering its area : Mouse « Windows Presentation Foundation « VB.Net

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