Windows Form Dynamic Generation

Question

Hello All,

I am creating a windows form that has a keypad on it, and three text input boxes. I need to be able to input numbers using the keypad and upon hitting enter, have it fill in in each of three box categories "a" "b" "c". The categories never change, but I need the scrollbox that they are kept in to dynamically generate new boxes with the same heading. I.e. I need the user to be able to enter these three values an unlimited amount of times. How do I make the input boxes appear when the user has filled all of the one's currently available?