MouseOver on ToggleButton to popup a Text - wpf

Question

I am coding to popup a Text when MouseOver on ToggleButton. I got it too, but the real problem is that popped Text is not remains constant i.e., it continuously shaking on the ToggleButton. One more thing is that popped Text is appeared on the ToggleButton itself but it should be beneath of it. How can i get rid of this one?
Here is my Code looks
<ToggleButton x:Name="btn" Width="20" Height="15">
<Image Source="../Images/flag_orange.ico"/>
</ToggleButton>
<Popup x:Name="popUp" IsOpen="{Binding IsChecked, ElementName=btn, Mode=TwoWay}"
StaysOpen="False" PlacementTarget="{Binding ElementName=btn}"
Placement="Bottom" PopupAnimation="Slide" HorizontalOffset="-5"
VerticalOffset="3">
<Border Background="DarkGray">
<TextBox Text="Its a place holder for user notes" x:Name="tbText"/>
</Border>
</Popup>
<TextBlock x:Name="tbTextBlock"
Visibility="{Binding Path=IsMouseOver,ElementName=btn,Mode=OneWay,
Converter={StaticResource BoolToVisibilityConverter}}"
Text="{Binding ElementName=tbText, Path=Text, Mode=TwoWay}" />

Answer 1

use IsHitTestVisible="False" on your TextBlock. The Mouseover is catched by the Textblock yet, so your mouse is not over the ToggleButton when the TextBlock appears.
To get the TextBlock beneath the ToggleButton use either a Margin="0,15,0,0" or a StackPanel to get those controls in order:
<StackPanel>
<ToggleButton x:Name="btn" Width="20" Height="15">
<Image Source="../Images/flag_orange.ico"/>
</ToggleButton>
<Popup x:Name="popUp" IsOpen="{Binding IsChecked, ElementName=btn, Mode=TwoWay}"
StaysOpen="False" PlacementTarget="{Binding ElementName=btn}"
Placement="Bottom" PopupAnimation="Slide" HorizontalOffset="-5"
VerticalOffset="3">
<Border Background="DarkGray">
<TextBox Text="Its a place holder for user notes" x:Name="tbText"/>
</Border>
</Popup>
<TextBlock x:Name="tbTextBlock"
IsHitTestVisible="False"
Visibility="{Binding Path=IsMouseOver,ElementName=btn,Mode=OneWay,
Converter={StaticResource BoolToVisibilityConverter}}"
Text="{Binding ElementName=tbText, Path=Text, Mode=TwoWay}" />
</StackPanel>