So if I have a Public Function named "LCode" in Module1, and Form1 has 2 textboxes: tbox1 and tbox2. When a numeric value is entered in tbox1, I want the function in Module1 to be applied to it, and display the result in tbox2. Can anyone please just tell me how to do that? help files seem to talk all around "how" to use functions but I'm not hearing what I need to fully understand what is being said. Thanks.