Sales Order Invoice Posting Class

Morning All,

Please I need help concerning a class. A field and a script was created on d salesparmline table so that the info on the new field updates the sales invoice report without hitting the GL. But I need the class that runs when a user clicks on post and updates d custinvoicejour table and form. I want to include d new field as part of d fields dat will be populated like the way others are populated.

Thanks!