[RBG7-L] - UPC-A check digit

[John Engwer]

I have an application where I need to create UPC codes (11 digits + check).    Question: Is there a way to have R:Base create the check character when you enter the first 11 digits so that I can store the full 12 digit code?   Since R:Base will create the check character when you print a UPC barcode, I suspect that there is a way to do this.    John