Fill a listbox using a combox without a loop

Hi all,

New here and new to vba. I have scoured the forum for an answer so if it exists forgive me for the duplicate question.

Is there a way to load a listbox by using the change event or click event on a combox without using a loop?

I want the user to populate the listbox every time he clicks on the combox's item. The user needs to be free to perform other actions in the userform and I think a loop will keep him tied to loading values till he clicks a button to exit the loop.

Thanks!