hutia wrote:

I have an Excel file with a list of pat_id and I'd like ot export it
to anohter programme. How do I do it?

If the target program can import text, save as a text file. (Or CSV or
whatever.)

If the target program requires a specific format not supported by Excel, you
could learn that format and then write a VBA function to do the export.

More info from you will get more info from here.

--
If I can't laugh at myself I'm really lost.