Hi All, I hate posting without at least having a starting point but I am absolutely clueless on this one. When a user enters an eleven or thirteen digit number into the subject I would like to do some processing on it. We use a barcode scanner to enter an eleven digit number into the subject line which is then manually reformatted to remove the last digit (a check digit) and add a hyphen between the sixth and seventh digits. I would like to automate this so that as soon as the value is entered (onKeyUp event???) it is reformatted programmatically but I am struggling to say the least. I will be very grateful for any pointers given. TIA Nick