Mousewheel Scroll Issues - Focus Stuck on Listbox

[ny1994rangers]

I have a Search Form that searches across multiple fields in my Access DB and then displays the results in a Listbox with many columns. When I click in the listbox, I am able to use my mousewheel scroll to scroll through the records. However, my form is large and I need to switch the mousewheel scroll to scroll up and down through the form once I click out of the Listbox.

It looks like my focus is staying on the listbox so even if I click in some white space on the form first, the mousewheel still scrolls up and down through my results.

Can anyone help?

Thanks in advance.