VS 2010 - Textbox Handling For XML While Loops

I have a sub which creates an XML file but the thing is, all the parameters are 'hardcoded', so I decided to give some inputs so each data in each node is customizable. Now, I would like a loop to read the text in textbox1 and assign that to variable one, do the same for textbox2, write the node, loop again (using the same variable) and assign that variable a value in textbox3 and write the node.

I can while loop to write nodes, but only for fixed data or data with 500000 variables for each loop. Is there any way to do this such that on each loop it dynamically sources the variables data from the 'next text box'. i.e. One first loop uses textbox1, second loop it knows it has used textbox1 .'. it uses textbox2 etc... Is there a way to do the same thing but write back to text boxes in an order, knowing what was previously written.