How to bind a textbox in customwindowcontrol

Hi,

I have created a CustomWindowcontrol as mention in the below link and i need to access the window title so i added a  textbox and that need to be binded ,so that i can access the textbox text value from my Model-view code . am using the customwindow as a dll. please let me know how to achieve this .

http://blog.magnusmontin.net/2013/03/16/how-to-create-a-custom-window-in-wpf/

Thanks