How Do I: Loop thru a list and load the textBox?

Hello:
 
I have the value of the Form in a variable: TheForm_ID. I need to figure out how to create an object to the Form so I can loop thru it and load the textBox in the Form.
 
I tried to use the Control, but cant get it to work. Can someone point me in the correct direction? I have been tring to figure this out for almost 2 weeks... Help.
 

            ClassControl ClassControl = new ClassControl(TheForm_ID);

            Control TheControlValue = TheForm.GetNextControl(null, true);  
 
 
ClassControl is my class where I do most of my work.