You can use a Script in Infoplus to automatically add Billing Codes to records, then either run that script through a Trigger, or on a list of selected records, to help automate the creation of Billing Codes.
Due to the ever-changing nature of writing and maintaining scripts, Infoplus does not provide support in this area. We recommend someone in your IT Department handles scripting requests internally so that you keep all control over the process.
Here's an example script to add a billing code to ASN's:
For a script like this, you will want its Record Type to be the type that you want to run the script against (that is, the type that you want to add the Billing Codes to). So for this example, the script's record type would be ASN. Also, please note, the billingCodes type is only available in API versions greater than 2.0 (including Beta).