TouchScreen Keyboard using c# in wpf Application

I am working in wpf application in .net platform. this application working in like ATM machine so we want to touch screen keyboard that time i got this sample. Its very simple to use this code. there is one Alphakeyboard.cs class download just add your application and call the touch screen method.

<Window xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" 
 xmlns:pti="clr-namespace:samplecode">


<TextBox Local:TouchScreenKeyboard.TouchScreenKeyboard="True" FontSize="30" Name="lot" TextChanged="{Local:DelegateCreator lot_Changed}" Style="{StaticResource RequiredTextBox}" Local:Ui.ClearAfterPrint="False" />

<Window/>