Thanks for all your help, I got it to work, but with one problem. If you type in the code then take out the code the number does not reduce. Is it possible to make it reduce because there will be mistakes made when entering the code.Thank you for all your help again

Thanks for you response, I cant get it to work.  I entered the exit.Event in the line for calculate for the text field (Code) and set it to Form calc.I entered the enter.event in the line for calculate for the numeric field (NumericField1) and set it to Form Calc. I set the text field to user entere...