WPF NotifyIcon

--------------
FIX   Removed debug output in WindowMessageSink.
CHG   Major rework on sample project.

git-svn-id: https://svn.evolvesoftware.ch/repos/evolve.net/WPF/NotifyIcon@104 9f600761-6f11-4665-b6dc-0185e9171623

Source/Sample Project/Tutorials/03 - Popups/InlinePopupWindow.xaml

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+<Window
+  x:Class="Samples.Tutorials.Popups.InlinePopupWindow"
+  xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+  xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+  xmlns:tb="http://www.hardcodet.net/taskbar"
+  Height="300"
+  Width="300">
+  <Grid>
+
+<tb:TaskbarIcon
+  x:Name="MyNotifyIcon"
+  IconSource="/Icons/Error.ico"
+  ToolTipText="hello world"
+  >
+
+  <!--
+    We can use arbitrary UI elements as Popups.
+    Popups stay open if the user moves away from the tray area
+  -->
+  <tb:TaskbarIcon.TrayPopup>
+    <Border
+      Background="White"
+      BorderBrush="Orange"
+      BorderThickness="2"
+      CornerRadius="4"
+      Width="160"
+      Height="40">
+      <Button
+        Content="Click Me!"
+        HorizontalAlignment="Center"
+        VerticalAlignment="Center" />
+    </Border>
+  </tb:TaskbarIcon.TrayPopup>
+
+</tb:TaskbarIcon>
+<TextBlock Margin="26,26,24,0" VerticalAlignment="Top" FontWeight="Bold" TextWrapping="Wrap"><Run Language="de-ch" Text="Left-Click NotifyIcon to open popup."/></TextBlock>
+
+  </Grid>
+</Window>

Source/Sample Project/Tutorials/03 - Popups/InlinePopupWindow.xaml.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Windows;
+using System.Windows.Controls;
+using System.Windows.Data;
+using System.Windows.Documents;
+using System.Windows.Input;
+using System.Windows.Media;
+using System.Windows.Media.Imaging;
+using System.Windows.Shapes;
+
+namespace Samples.Tutorials.Popups
+{
+  /// <summary>
+  /// Interaction logic for InlinePopupWindow.xaml
+  /// </summary>
+  public partial class InlinePopupWindow : Window
+  {
+    public InlinePopupWindow()
+    {
+      InitializeComponent();
+    }
+
+    protected override void OnClosing(System.ComponentModel.CancelEventArgs e)
+    {
+      //clean up notifyicon (would otherwise stay open until application finishes)
+      MyNotifyIcon.Dispose();
+
+      base.OnClosing(e);
+    }
+  }
+}