What are combo boxes used for?
A combo box is a text box with a list box attached. This type of control enables users to select a predefined value in a list or type their own value in the text box portion of the control.
How many types of combo box control we have?
Combo box controls contain a list of items that can be selected by the user. A combo box consists of two parts: an edit box and a static text box combined with a list box. There are three types of combo boxes.