How to set and get updatesourcetrigger of a textbox in codebehind?

Question

Just a short question :
In wpf, how do I set and get updatesourcetrigger of a textbox in codebehind ?
Thanks

Update :
I follow

Answer 1

I think this the right way to do this:

 Binding binding = new Binding();

 binding.Source = new CustomerViewModel();;
 binding.Path = new PropertyPath("Customer.Name");
 binding.Mode = BindingMode.TwoWay;
 binding.UpdateSourceTrigger = UpdateSourceTrigger.PropertyChanged;
 txtCustName.SetBinding(TextBox.TextProperty, binding);