When would you use a Combo Box content control? How do you insert one into a form and add items to the list of choices?

What will be an ideal response?

You would use a Combo Box content control when you want users to select an item from a list of choices or type a new item. To insert a Combo Box content control, click the Combo Box Content Control button in the Controls group. To add items to the list of choices, click Properties in the Controls group, click Add, and type the text of the first choice. Continue to click Add to add other items to the list.