Answer:
With a Combo box, you can enter a value either by typing the value or by selecting it from a list.
Step-by-step explanation:
While working on forms, different types of controls present under the toolbox of development environment are make into use by dragging them onto the form with the help of mouse.
One of the control from toolbox is Combo Box, which is actually a mixture of listbox and a textbox. This means it has properties of both the boxes because the desired value or entity can be written into the combo box manually and it can also be chose from the drop down menu (list) which appears on clicking the small arrow head.