When should a select be replaced with a combobox?

1. What are the two main things a combo box needs to work?
2. What is the function of combo box?
3. What is combo box in programming?

What are the two main things a combo box needs to work?

A combo box consists of a list and a selection field. The list presents the options that a user can select, and the selection field displays the current selection.

What is the function of combo box?

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. The list is hidden until the user clicks the arrow next to the box.

What is combo box in programming?

A combo box is a GUI feature that combines a drop-down box, list box, and/or an editable text field, giving the user multiple ways to input or select the desired information. The term "combo box" may also refer specifically to a drop-down list, which only allows choices to be selected (user cannot type a value).