Quote Originally Posted by Amoque View Post
...

One last - is it necessary to compare ALL bytes, or might you only compare say... the first one. This would seem to yield a unique condition and save the effort and complexity of so long a line:

If (Serial[1]=$15) then Correct1

Speaking out my bellybutton, I'd say yes. The other serial numbers still have to be validated (knowing absolutely nothing about his application).

Robert