I am developing an order management system that requires each individidual record to have a barcode/QR code so that they can be scanned to bring up information at certain points along our manufacturing cycle. 

I have created a 13 digit autofill number for each record, and I would like to retrieve a QR code using that autofill number from an external website, however I don't know how to input the field name into the URL so that it automatically fills this part of the URL with the records Autonumber?  

I have tried the below, but it doesn't seem to be working: 

Please help! 

Thanks,

Jon