Batch find and replace utility for Word documents

I need a utility that will read a comma delimited file with "old" numeric codes and their corresponding "new" code. I need this utility to take every Word (.doc) document in a folder and replace each "old" code with the "new" code. The old codes are like this: {code_248734682375} and the new ones like {enc-nac-72647563}. ## Deliverables I don't need the utility to be "installable". It can be a single compiled executable, although if it needs to be installed for it to work, that is fine. I leave it up to the coder whether to have it ask for the path of the CSV (comma delimited file) with codes, or whether to require it to be on the executable's folder. I would like for it to have a "browse" button to search for the place where the Word documents to be converted are located. I also want a report after it has gone through all files, displaying how many replacements were done per file. It is worth noting that the CSV file will have something like 6000 different old codes and their corresponding 6000 new codes.