Report to Update Sales Header Boolean

I want to be able to print a report and have it update a Boolean on the Sales Header that identifies that it has been printed. I created the report and the Boolean field in the Sales Header but have no idea where to go from here. Any suggestions would help. Thank you!

You can have a look at the invoice report(206). This updates a counter for how many times it was printed in the sales invoice header table (112). The code is in the CopyLoop dataitem. Succes [8D]

Thanks Mark!