I have a combo box that the user can select an item to filter the form to the selected value. This works fine as long as they choose an item. What if I want to display all of the items? To state it easy, I want to allow the user to select "A" , "B" or all of "A&B"

John,

I believe that only listboxes have the multiselect property. So change your combobox to a list box, and choose:

multiselect : simple

Or, you can keep your combobox, but add a ALL to the top. I am not sure exactly how this is done. But if you go to the search you will find many posts about it.

HTH