Getting Computer To Remember Codes

Good afternoon jpe1

Yes it is possible.

First you will have to write them using VBA (user defined functions), then install your file as an add-in.
If you do this, then users to whom you send your file will also need your add-in installed to use your file.

The alternative is to use only the UDF's you need in just the files you need them in - then they will "travel" with the file.

HTH

DominicB