Conditional locking of cell based on another cell

The password function works. But here's what I need. If there is a positive number (or any number, I've validated it for only positive) in H19, H20 locks. And once I reset H19 to 0, H20 opens. And vice versa. If I put a value in H20, H19 locks until I put 0 in H20 again. And with this code, as soon as I put a value in the first cell (either H19 or H20) the other locks, but DOES NOT re-open when I put the value back to 0 in the open cell. Hope that makes sense. Thanks!

No, it's still not working. You are right, I need to just be able to put 0 and have it unlock, not delete altogether. But what's happening is let's say you put a value in H19. H20 does lock, but when you then put 0 in H19, H19 locks. In that case they should both be open, because they both say 0. And the same happens in reverse. I think that's what all that code was for, but I no nothing about programming! Also, with the other code, it jumped back up to H19 when i typed 0 in H20, and jumped to H20 when I typed 0 in H19 so they were both ready for cell entry. That's pretty much convenience though! Would it be easier to just add the password string or whatever to the other code? If not, is there a way to fix that quirk so that anytime either cell is 0 it's unlocked? Thanks a ton RoyUK!

Yep, works perfectly! Thanks for your help Roy!

So for learning purposes, what does the option explicit do?

ok thanks!