This is probably very easy but i dont know to much about macros yet.

Example
I have a invoice ref # 001 (existing document)

I want to press a button labeled "print" (user action)

The macro adds +1 to existing invoice ref# cell. Copy the value of cell "X"
, "Y" and "Z" and invoice ref# cell to spread sheet #2 (creating a database)

Prints active worksheet.

Saves the document

Now I have a new invoice ref #002 and the 3 cell values are stored together
in the database on spread sheet #2.

This way, next time i'm invoicing, my database gets updated and i'll have a
refrence number to all my invoices for history puposes.

Thanks.