Sorry for my english, I´m fighting with it. :oops: The job is as follows: I have created an invoice model in Word. When I open the document I need to autocomplete the field invoice number. (As you know invoices need to be correlatively numbered.) Numerically it´s easy (a=a+1), simply take the ...

Wow! very nice forum and quick answer... Yes, you are wright, dont need random. It´s a sequence. My problem was setting the characters to use and how to calculate the following step. example: take AA5GTR45A and then get AA5GTR45B adding the next number or letter following the numerical order and ...