diff --git a/src/Carnac/UI/KeyShowView.xaml b/src/Carnac/UI/KeyShowView.xaml
index 03e05521..879abcbf 100644
--- a/src/Carnac/UI/KeyShowView.xaml
+++ b/src/Carnac/UI/KeyShowView.xaml
@@ -16,6 +16,8 @@
             </CollectionViewSource.SortDescriptions>
         </CollectionViewSource>
         <BooleanToVisibilityConverter x:Key="BooleanToVisibilityConverter"/>
+        <ui:ToSpecialKeyConverter x:Key="ToSpecialKeyConverter"/>
+
         <DrawingBrush x:Key="Layer1" Stretch="Uniform">
             <DrawingBrush.Drawing>
                 <DrawingGroup>
@@ -59,21 +61,21 @@
                 <DrawingGroup>
                     <DrawingGroup.Children>
                         <!-- LButton-->
-                        <GeometryDrawing 
+                        <GeometryDrawing
                             Geometry="m 46.391602,51.716399 0,-7.377479 c -3.043273,-1.255393 -5.160701,-4.035957 -5.160701,-7.267024 l 0,-13.721688 c 0,-3.231067 2.117225,-6.011631 5.160701,-7.267023 l 0,-14.5461655 -3.432794,0 c -14.497903,0 -26.250782,11.3736575 -26.250782,25.4038915 l 0,24.775488 29.683576,0 z">
                             <GeometryDrawing.Brush>
                                 <SolidColorBrush Color="Red" />
                             </GeometryDrawing.Brush>
                         </GeometryDrawing>
                         <!-- RButton-->
-                        <GeometryDrawing 
+                        <GeometryDrawing
                             Geometry="m 53.66105,16.082983 c 3.043272,1.255393 5.160701,4.035957 5.160701,7.267024 l 0,13.721688 c 0,3.231067 -2.117225,6.011631 -5.160701,7.267023 l 0,7.377681 29.683576,0 0,-24.775488 c 0,-14.030234 -11.752879,-25.4038915 -26.250782,-25.4038915 l -3.432794,0 0,14.5459635 z">
                             <GeometryDrawing.Brush>
                                 <SolidColorBrush Color="{Binding DataContext.Settings.ItemBackgroundColor, Source={x:Reference This}}" />
                             </GeometryDrawing.Brush>
                         </GeometryDrawing>
                         <!-- Bottom Part-->
-                        <GeometryDrawing 
+                        <GeometryDrawing
                             Geometry="m 16.708026,53.836655 0,19.222236 c 0,14.030437 11.752879,25.404095 26.250782,25.404095 l 14.135036,0 c 14.497903,0 26.250782,-11.373658 26.250782,-25.404095 l 0,-19.222236 -66.6366,0 z">
                             <GeometryDrawing.Brush>
                                 <SolidColorBrush Color="{Binding DataContext.Settings.ItemBackgroundColor, Source={x:Reference This}}" />
@@ -88,21 +90,21 @@
                 <DrawingGroup>
                     <DrawingGroup.Children>
                         <!-- LButton-->
-                        <GeometryDrawing 
+                        <GeometryDrawing
                             Geometry="m 46.391602,51.716399 0,-7.377479 c -3.043273,-1.255393 -5.160701,-4.035957 -5.160701,-7.267024 l 0,-13.721688 c 0,-3.231067 2.117225,-6.011631 5.160701,-7.267023 l 0,-14.5461655 -3.432794,0 c -14.497903,0 -26.250782,11.3736575 -26.250782,25.4038915 l 0,24.775488 29.683576,0 z">
                             <GeometryDrawing.Brush>
                                 <SolidColorBrush Color="{Binding DataContext.Settings.ItemBackgroundColor, Source={x:Reference This}}" />
                             </GeometryDrawing.Brush>
                         </GeometryDrawing>
                         <!-- RButton-->
-                        <GeometryDrawing 
+                        <GeometryDrawing
                             Geometry="m 53.66105,16.082983 c 3.043272,1.255393 5.160701,4.035957 5.160701,7.267024 l 0,13.721688 c 0,3.231067 -2.117225,6.011631 -5.160701,7.267023 l 0,7.377681 29.683576,0 0,-24.775488 c 0,-14.030234 -11.752879,-25.4038915 -26.250782,-25.4038915 l -3.432794,0 0,14.5459635 z">
                             <GeometryDrawing.Brush>
                                 <SolidColorBrush Color="Red" />
                             </GeometryDrawing.Brush>
                         </GeometryDrawing>
                         <!-- Bottom Part-->
-                        <GeometryDrawing 
+                        <GeometryDrawing
                             Geometry="m 16.708026,53.836655 0,19.222236 c 0,14.030437 11.752879,25.404095 26.250782,25.404095 l 14.135036,0 c 14.497903,0 26.250782,-11.373658 26.250782,-25.404095 l 0,-19.222236 -66.6366,0 z">
                             <GeometryDrawing.Brush>
                                 <SolidColorBrush Color="{Binding DataContext.Settings.ItemBackgroundColor, Source={x:Reference This}}" />
@@ -117,35 +119,35 @@
                 <DrawingGroup>
                     <DrawingGroup.Children>
                         <!-- LButton-->
-                        <GeometryDrawing 
+                        <GeometryDrawing
                             Geometry="m 46.391602,51.716399 0,-7.377479 c -3.043273,-1.255393 -5.160701,-4.035957 -5.160701,-7.267024 l 0,-13.721688 c 0,-3.231067 2.117225,-6.011631 5.160701,-7.267023 l 0,-14.5461655 -3.432794,0 c -14.497903,0 -26.250782,11.3736575 -26.250782,25.4038915 l 0,24.775488 29.683576,0 z">
                             <GeometryDrawing.Brush>
                                 <SolidColorBrush Color="{Binding DataContext.Settings.ItemBackgroundColor, Source={x:Reference This}}" />
                             </GeometryDrawing.Brush>
                         </GeometryDrawing>
                         <!-- RButton-->
-                        <GeometryDrawing 
+                        <GeometryDrawing
                             Geometry="m 53.66105,16.082983 c 3.043272,1.255393 5.160701,4.035957 5.160701,7.267024 l 0,13.721688 c 0,3.231067 -2.117225,6.011631 -5.160701,7.267023 l 0,7.377681 29.683576,0 0,-24.775488 c 0,-14.030234 -11.752879,-25.4038915 -26.250782,-25.4038915 l -3.432794,0 0,14.5459635 z">
                             <GeometryDrawing.Brush>
                                 <SolidColorBrush Color="{Binding DataContext.Settings.ItemBackgroundColor, Source={x:Reference This}}" />
                             </GeometryDrawing.Brush>
                         </GeometryDrawing>
                         <!-- MButtonTop-->
-                        <GeometryDrawing 
+                        <GeometryDrawing
                             Geometry="m 50.026326,19.406614 c -3.178363,0 -5.753713,2.57928 -5.753713,5.757645 l 0,4.947484 11.507426,0 0,-4.947484 c 0,-3.178365 -2.57535,-5.757645 -5.753713,-5.757645 z">
                             <GeometryDrawing.Brush>
                                 <SolidColorBrush Color="Red" />
                             </GeometryDrawing.Brush>
                         </GeometryDrawing>
                         <!-- MButtonBottom-->
-                        <GeometryDrawing 
+                        <GeometryDrawing
                             Geometry="m 55.780039,30.111743 -11.507426,0 0,4.943552 c 0,3.178363 2.57535,5.757645 5.753713,5.757645 3.178363,0 5.753713,-2.579282 5.753713,-5.757645 l 0,-4.943552 z">
                             <GeometryDrawing.Brush>
                                 <SolidColorBrush Color="Red" />
                             </GeometryDrawing.Brush>
                         </GeometryDrawing>
                         <!-- Bottom Part-->
-                        <GeometryDrawing 
+                        <GeometryDrawing
                             Geometry="m 16.708026,53.836655 0,19.222236 c 0,14.030437 11.752879,25.404095 26.250782,25.404095 l 14.135036,0 c 14.497903,0 26.250782,-11.373658 26.250782,-25.404095 l 0,-19.222236 -66.6366,0 z">
                             <GeometryDrawing.Brush>
                                 <SolidColorBrush Color="{Binding DataContext.Settings.ItemBackgroundColor, Source={x:Reference This}}" />
@@ -160,35 +162,35 @@
                 <DrawingGroup>
                     <DrawingGroup.Children>
                         <!-- LButton-->
-                        <GeometryDrawing 
+                        <GeometryDrawing
                             Geometry="m 46.391602,51.716399 0,-7.377479 c -3.043273,-1.255393 -5.160701,-4.035957 -5.160701,-7.267024 l 0,-13.721688 c 0,-3.231067 2.117225,-6.011631 5.160701,-7.267023 l 0,-14.5461655 -3.432794,0 c -14.497903,0 -26.250782,11.3736575 -26.250782,25.4038915 l 0,24.775488 29.683576,0 z">
                             <GeometryDrawing.Brush>
                                 <SolidColorBrush Color="{Binding DataContext.Settings.ItemBackgroundColor, Source={x:Reference This}}" />
                             </GeometryDrawing.Brush>
                         </GeometryDrawing>
                         <!-- RButton-->
-                        <GeometryDrawing 
+                        <GeometryDrawing
                             Geometry="m 53.66105,16.082983 c 3.043272,1.255393 5.160701,4.035957 5.160701,7.267024 l 0,13.721688 c 0,3.231067 -2.117225,6.011631 -5.160701,7.267023 l 0,7.377681 29.683576,0 0,-24.775488 c 0,-14.030234 -11.752879,-25.4038915 -26.250782,-25.4038915 l -3.432794,0 0,14.5459635 z">
                             <GeometryDrawing.Brush>
                                 <SolidColorBrush Color="{Binding DataContext.Settings.ItemBackgroundColor, Source={x:Reference This}}" />
                             </GeometryDrawing.Brush>
                         </GeometryDrawing>
                         <!-- MButtonTop-->
-                        <GeometryDrawing 
+                        <GeometryDrawing
                             Geometry="m 50.026326,19.406614 c -3.178363,0 -5.753713,2.57928 -5.753713,5.757645 l 0,4.947484 11.507426,0 0,-4.947484 c 0,-3.178365 -2.57535,-5.757645 -5.753713,-5.757645 z">
                             <GeometryDrawing.Brush>
                                 <SolidColorBrush Color="Red" />
                             </GeometryDrawing.Brush>
                         </GeometryDrawing>
                         <!-- MButtonBottom-->
-                        <GeometryDrawing 
+                        <GeometryDrawing
                             Geometry="m 55.780039,30.111743 -11.507426,0 0,4.943552 c 0,3.178363 2.57535,5.757645 5.753713,5.757645 3.178363,0 5.753713,-2.579282 5.753713,-5.757645 l 0,-4.943552 z">
                             <GeometryDrawing.Brush>
                                 <SolidColorBrush Color="{Binding DataContext.Settings.ItemBackgroundColor, Source={x:Reference This}}" />
                             </GeometryDrawing.Brush>
                         </GeometryDrawing>
                         <!-- Bottom Part-->
-                        <GeometryDrawing 
+                        <GeometryDrawing
                             Geometry="m 16.708026,53.836655 0,19.222236 c 0,14.030437 11.752879,25.404095 26.250782,25.404095 l 14.135036,0 c 14.497903,0 26.250782,-11.373658 26.250782,-25.404095 l 0,-19.222236 -66.6366,0 z">
                             <GeometryDrawing.Brush>
                                 <SolidColorBrush Color="{Binding DataContext.Settings.ItemBackgroundColor, Source={x:Reference This}}" />
@@ -203,35 +205,35 @@
                 <DrawingGroup>
                     <DrawingGroup.Children>
                         <!-- LButton-->
-                        <GeometryDrawing 
+                        <GeometryDrawing
                             Geometry="m 46.391602,51.716399 0,-7.377479 c -3.043273,-1.255393 -5.160701,-4.035957 -5.160701,-7.267024 l 0,-13.721688 c 0,-3.231067 2.117225,-6.011631 5.160701,-7.267023 l 0,-14.5461655 -3.432794,0 c -14.497903,0 -26.250782,11.3736575 -26.250782,25.4038915 l 0,24.775488 29.683576,0 z">
                             <GeometryDrawing.Brush>
                                 <SolidColorBrush Color="{Binding DataContext.Settings.ItemBackgroundColor, Source={x:Reference This}}" />
                             </GeometryDrawing.Brush>
                         </GeometryDrawing>
                         <!-- RButton-->
-                        <GeometryDrawing 
+                        <GeometryDrawing
                             Geometry="m 53.66105,16.082983 c 3.043272,1.255393 5.160701,4.035957 5.160701,7.267024 l 0,13.721688 c 0,3.231067 -2.117225,6.011631 -5.160701,7.267023 l 0,7.377681 29.683576,0 0,-24.775488 c 0,-14.030234 -11.752879,-25.4038915 -26.250782,-25.4038915 l -3.432794,0 0,14.5459635 z">
                             <GeometryDrawing.Brush>
                                 <SolidColorBrush Color="{Binding DataContext.Settings.ItemBackgroundColor, Source={x:Reference This}}" />
                             </GeometryDrawing.Brush>
                         </GeometryDrawing>
                         <!-- MButtonTop-->
-                        <GeometryDrawing 
+                        <GeometryDrawing
                             Geometry="m 50.026326,19.406614 c -3.178363,0 -5.753713,2.57928 -5.753713,5.757645 l 0,4.947484 11.507426,0 0,-4.947484 c 0,-3.178365 -2.57535,-5.757645 -5.753713,-5.757645 z">
                             <GeometryDrawing.Brush>
                                 <SolidColorBrush Color="{Binding DataContext.Settings.ItemBackgroundColor, Source={x:Reference This}}" />
                             </GeometryDrawing.Brush>
                         </GeometryDrawing>
                         <!-- MButtonBottom-->
-                        <GeometryDrawing 
+                        <GeometryDrawing
                             Geometry="m 55.780039,30.111743 -11.507426,0 0,4.943552 c 0,3.178363 2.57535,5.757645 5.753713,5.757645 3.178363,0 5.753713,-2.579282 5.753713,-5.757645 l 0,-4.943552 z">
                             <GeometryDrawing.Brush>
                                 <SolidColorBrush Color="Red" />
                             </GeometryDrawing.Brush>
                         </GeometryDrawing>
                         <!-- Bottom Part-->
-                        <GeometryDrawing 
+                        <GeometryDrawing
                             Geometry="m 16.708026,53.836655 0,19.222236 c 0,14.030437 11.752879,25.404095 26.250782,25.404095 l 14.135036,0 c 14.497903,0 26.250782,-11.373658 26.250782,-25.404095 l 0,-19.222236 -66.6366,0 z">
                             <GeometryDrawing.Brush>
                                 <SolidColorBrush Color="{Binding DataContext.Settings.ItemBackgroundColor, Source={x:Reference This}}" />
@@ -246,35 +248,35 @@
                 <DrawingGroup>
                     <DrawingGroup.Children>
                         <!-- LButton-->
-                        <GeometryDrawing 
+                        <GeometryDrawing
                             Geometry="m 46.391602,51.716399 0,-7.377479 c -3.043273,-1.255393 -5.160701,-4.035957 -5.160701,-7.267024 l 0,-13.721688 c 0,-3.231067 2.117225,-6.011631 5.160701,-7.267023 l 0,-14.5461655 -3.432794,0 c -14.497903,0 -26.250782,11.3736575 -26.250782,25.4038915 l 0,24.775488 29.683576,0 z">
                             <GeometryDrawing.Brush>
                                 <SolidColorBrush Color="{Binding DataContext.Settings.ItemBackgroundColor, Source={x:Reference This}}" />
                             </GeometryDrawing.Brush>
                         </GeometryDrawing>
                         <!-- RButton-->
-                        <GeometryDrawing 
+                        <GeometryDrawing
                             Geometry="m 53.66105,16.082983 c 3.043272,1.255393 5.160701,4.035957 5.160701,7.267024 l 0,13.721688 c 0,3.231067 -2.117225,6.011631 -5.160701,7.267023 l 0,7.377681 29.683576,0 0,-24.775488 c 0,-14.030234 -11.752879,-25.4038915 -26.250782,-25.4038915 l -3.432794,0 0,14.5459635 z">
                             <GeometryDrawing.Brush>
                                 <SolidColorBrush Color="{Binding DataContext.Settings.ItemBackgroundColor, Source={x:Reference This}}" />
                             </GeometryDrawing.Brush>
                         </GeometryDrawing>
                         <!-- XButton1-->
-                        <GeometryDrawing 
+                        <GeometryDrawing
                             Geometry="m 12.886028,48.446033 c 0.0031,0.904655 3.827831,0.871751 3.827831,0.871751 L 16.697146,27.71558 c 0,0 -3.812807,0.02662 -3.813517,0.928656 -7.09e-4,0.902035 -6.94e-4,18.897144 0.0024,19.801797 z">
                             <GeometryDrawing.Brush>
                                 <SolidColorBrush Color="Red" />
                             </GeometryDrawing.Brush>
                         </GeometryDrawing>
                         <!-- XButton2-->
-                        <GeometryDrawing 
+                        <GeometryDrawing
                             Geometry="m 87.113974,48.446033 c -0.003,0.904655 -3.827831,0.871751 -3.827831,0.871751 l 0.01671,-21.602204 c 0,0 3.812807,0.02662 3.813516,0.928656 7.09e-4,0.902035 6.93e-4,18.897144 -0.0024,19.801797 z">
                             <GeometryDrawing.Brush>
                                 <SolidColorBrush Color="{Binding DataContext.Settings.ItemBackgroundColor, Source={x:Reference This}}" />
                             </GeometryDrawing.Brush>
                         </GeometryDrawing>
                         <!-- Bottom Part-->
-                        <GeometryDrawing 
+                        <GeometryDrawing
                             Geometry="m 16.708026,53.836655 0,19.222236 c 0,14.030437 11.752879,25.404095 26.250782,25.404095 l 14.135036,0 c 14.497903,0 26.250782,-11.373658 26.250782,-25.404095 l 0,-19.222236 -66.6366,0 z">
                             <GeometryDrawing.Brush>
                                 <SolidColorBrush Color="{Binding DataContext.Settings.ItemBackgroundColor, Source={x:Reference This}}" />
@@ -289,35 +291,35 @@
                 <DrawingGroup>
                     <DrawingGroup.Children>
                         <!-- LButton-->
-                        <GeometryDrawing 
+                        <GeometryDrawing
                             Geometry="m 46.391602,51.716399 0,-7.377479 c -3.043273,-1.255393 -5.160701,-4.035957 -5.160701,-7.267024 l 0,-13.721688 c 0,-3.231067 2.117225,-6.011631 5.160701,-7.267023 l 0,-14.5461655 -3.432794,0 c -14.497903,0 -26.250782,11.3736575 -26.250782,25.4038915 l 0,24.775488 29.683576,0 z">
                             <GeometryDrawing.Brush>
                                 <SolidColorBrush Color="{Binding DataContext.Settings.ItemBackgroundColor, Source={x:Reference This}}" />
                             </GeometryDrawing.Brush>
                         </GeometryDrawing>
                         <!-- RButton-->
-                        <GeometryDrawing 
+                        <GeometryDrawing
                             Geometry="m 53.66105,16.082983 c 3.043272,1.255393 5.160701,4.035957 5.160701,7.267024 l 0,13.721688 c 0,3.231067 -2.117225,6.011631 -5.160701,7.267023 l 0,7.377681 29.683576,0 0,-24.775488 c 0,-14.030234 -11.752879,-25.4038915 -26.250782,-25.4038915 l -3.432794,0 0,14.5459635 z">
                             <GeometryDrawing.Brush>
                                 <SolidColorBrush Color="{Binding DataContext.Settings.ItemBackgroundColor, Source={x:Reference This}}" />
                             </GeometryDrawing.Brush>
                         </GeometryDrawing>
                         <!-- XButton1-->
-                        <GeometryDrawing 
+                        <GeometryDrawing
                             Geometry="m 12.886028,48.446033 c 0.0031,0.904655 3.827831,0.871751 3.827831,0.871751 L 16.697146,27.71558 c 0,0 -3.812807,0.02662 -3.813517,0.928656 -7.09e-4,0.902035 -6.94e-4,18.897144 0.0024,19.801797 z">
                             <GeometryDrawing.Brush>
                                 <SolidColorBrush Color="{Binding DataContext.Settings.ItemBackgroundColor, Source={x:Reference This}}" />
                             </GeometryDrawing.Brush>
                         </GeometryDrawing>
                         <!-- XButton2-->
-                        <GeometryDrawing 
+                        <GeometryDrawing
                             Geometry="m 87.113974,48.446033 c -0.003,0.904655 -3.827831,0.871751 -3.827831,0.871751 l 0.01671,-21.602204 c 0,0 3.812807,0.02662 3.813516,0.928656 7.09e-4,0.902035 6.93e-4,18.897144 -0.0024,19.801797 z">
                             <GeometryDrawing.Brush>
                                 <SolidColorBrush Color="Red" />
                             </GeometryDrawing.Brush>
                         </GeometryDrawing>
                         <!-- Bottom Part-->
-                        <GeometryDrawing 
+                        <GeometryDrawing
                             Geometry="m 16.708026,53.836655 0,19.222236 c 0,14.030437 11.752879,25.404095 26.250782,25.404095 l 14.135036,0 c 14.497903,0 26.250782,-11.373658 26.250782,-25.404095 l 0,-19.222236 -66.6366,0 z">
                             <GeometryDrawing.Brush>
                                 <SolidColorBrush Color="{Binding DataContext.Settings.ItemBackgroundColor, Source={x:Reference This}}" />
@@ -429,7 +431,7 @@
                                         </StackPanel>
                                     </Border>
 
-                          
+
                                     <TextBlock x:Name="regular" Margin="0" VerticalAlignment="Center" Text="{Binding }"
                                                Padding="0" />
                                 </StackPanel>
@@ -443,26 +445,7 @@
                                         <Setter TargetName="regular" Property="Control.Visibility" Value="Collapsed" />
                                     </DataTrigger>
 
-                                    <DataTrigger Value="Back" Binding="{Binding .}">
-                                        <Setter TargetName="KeyCapBorder" Property="Control.Visibility" Value="Visible" />
-                                        <Setter TargetName="regular" Property="Control.Visibility" Value="Collapsed" />
-                                    </DataTrigger>
-
-                                    <DataTrigger Value="Escape" Binding="{Binding .}">
-                                        <Setter TargetName="KeyCapBorder" Property="Control.Visibility" Value="Visible" />
-                                        <Setter TargetName="regular" Property="Control.Visibility" Value="Collapsed" />
-                                    </DataTrigger>
-
-                                    <DataTrigger Value="Alt" Binding="{Binding .}">
-                                        <Setter TargetName="KeyCapBorder" Property="Control.Visibility" Value="Visible" />
-                                        <Setter TargetName="regular" Property="Control.Visibility" Value="Collapsed" />
-                                    </DataTrigger>
-                                    <DataTrigger Value="Ctrl" Binding="{Binding .}">
-                                        <Setter TargetName="KeyCapBorder" Property="Control.Visibility" Value="Visible" />
-                                        <Setter TargetName="regular" Property="Control.Visibility" Value="Collapsed" />
-                                    </DataTrigger>
-
-                                    <DataTrigger Value="Shift" Binding="{Binding .}">
+                                    <DataTrigger Value="SPECIAL_KEY" Binding="{Binding ., Converter={StaticResource ToSpecialKeyConverter}}">
                                         <Setter TargetName="KeyCapBorder" Property="Control.Visibility" Value="Visible" />
                                         <Setter TargetName="regular" Property="Control.Visibility" Value="Collapsed" />
                                     </DataTrigger>
diff --git a/src/Carnac/UI/ToSpecialKeyConverter.cs b/src/Carnac/UI/ToSpecialKeyConverter.cs
new file mode 100644
index 00000000..185b2858
--- /dev/null
+++ b/src/Carnac/UI/ToSpecialKeyConverter.cs
@@ -0,0 +1,55 @@
+using System;
+using System.Collections.Generic;
+using System.Globalization;
+using System.Windows.Data;
+
+namespace Carnac.UI
+{
+    public class ToSpecialKeyConverter : IValueConverter
+    {
+
+        private readonly List<String> specialKeys = new List<String>(){
+            "Escape",
+            "Alt",
+            "Ctrl",
+            "Shift",
+            "Tab",
+            "Delete",
+            "Insert",
+            "Home",
+            "Next",
+            "PageUp",
+            "PageDown",
+            "End",
+            "Back",
+            "NumLock",
+            "PrintScreen",
+            "Scroll",
+            "Capital",
+            "F1",
+            "F2",
+            "F3",
+            "F4",
+            "F5",
+            "F6",
+            "F7",
+            "F8",
+            "F9",
+            "F10",
+            "F11",
+            "F12",
+            "Apps",
+            "BrowserHome",
+        };
+
+        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
+        {
+            return specialKeys.Contains(value.ToString()) ? "SPECIAL_KEY" : value;
+        }
+
+        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
+        {
+            throw new NotImplementedException();
+        }
+    }
+}