Getting Data from a form into a class?

Question

Hello All,

I'm new to this whole "classes" tier of the three tier data model, so please be kind:).
I have a .dll -- I want to place data into classes from textboxes on a form that then gets placed into a form in my .dll from those created classes:

1) I have no idea of any of the info from the form that I would receive the info from

Better yet:  For example;

I have a form that has a textbox (txtPhone) that contains a phone number in it , I would like to get that data from the texbox into a class in my .dll, and then place it in a textbox (txtphone) that I have on a form inside my .dll

Sorry, if it's confusing......imagine what I think...  Any help on how to go about this would be VERY much appreciated...thanks.   Zcast