How to avoid memory leak in code of Win 7 - Onscreen keyboard while clicking in textbox inside web browser control in wpf

Hello Team,

I am developing WPF - Web browser based kiosk application.

I have implemented the feature like when somebody clicks on any textbox inside the page rendered in web browser control then onscreen keyboard will open.

But the code which I have implemented is causing the continuous memory leak. 

Please help to avoid memory leak.

Thanks,

Pritesh