I have two textboxes in my form. I would like to be able to type in a math expression in box 1 and when I tab out of that box, I would like the result to show in box 2. For example, if I type "9 - 5" in box 1 and tab out, I would like "4" to show up in box 2. Is the code for this really hard? Would somebody kindly share it with us?