How can I bind a Controller class variable to my Context?

I have a number of fields which need to update some variables in my controller class. So, I want to add these fields to my screen so that when I change their content it updated the variables in the controller class.

How do I bind these (manually) as I don't think the Wizard works for this when actioned from the Context?.

Any help would be much appreciated. I have never had to bind global variables before.

John Sapora