Quick base Formula functions

Can you explain what you mean? Loading a code page in a formula field? Are you inserting it into the page in an iframe?

For code pages generally you can send information to the code page via the URL and use JavaScript to pick stuff from the URL itself.

You could make a call from your code page to whatever table you want and pull information that way too. If you need to use some of the formula functions then you can just have a formula field doing whatever calculations you need and pull that into your code page.

Those are the ways I usually work with them.