Probably this is a stupid question, but the closest answer I can find
anywhere is Debra Dagleish's code that allows for consecutive selections from
a data-validation dropdown to be entered in a cell, separated by commas. For
a few reasons I'd rather do something with a ListBox in a UserForm.

On the UserForm is a ListBox (called ListBox2) which can contain any number
of items. When a user clicks a button on the UserForm, is it possible to have
those items, separated by commas, deposited into the Active Cell on the
current worksheet?

If anyone could help, I'd really appreciate it. I keep finding close
alternatives to what I need, but nothing that quite hits it, and I'm clearly
I'm just not smart enough to do this.