mrmrs | Personal Portfolio Site | Portfolio library

Inside your function marked where you are checking the current status of the checkbox, you can add visibility: hidden and when unchecked you can unset it. That way it will hide your form field whenever the user selects a One Way checkbox.

Here's a quick rewrite where I've:

1. Put all the code into a single routine. We create the outlook application once and send many times from the one instance
2. Switched to a For Each loop which is a little cleaner
3. Removed the DoEvents into a comment. IF you absolute need to be able to break code execution while it's running then you'll want to keep DoEvents in your loop. If you don't care though and just want the thing to run as fast as possible, then leave it out. I would suggest (as @JoshEller noted) that saving these emails as drafts first might be the better alternative. Then you can send manually from your outlook catching any mistakes that may have been made before it's too late (and embarrassing).