When does a combo box get unwieldy?

1. When to use combo box?
2. What is difference between ComboBox and dropdown?
3. What is the function of combo box?

When to use combo box?

When to use a combo box. Use a combo box when you want to: Enable users to either select a predefined value from a list of choices or type their own value. Hide list items on the form by default.

What is difference between ComboBox and dropdown?

A drop-down list is a list in which the selected item is always visible, and the others are visible on demand by clicking a drop-down button. A combo box is a combination of a standard list box or a drop-down list and an editable text box, thus allowing users to enter a value that isn't in the list.

What is the function of combo box?

A ComboBox displays a text box combined with a ListBox, which enables the user to select items from the list or enter a new value. The DropDownStyle property specifies whether the list is always displayed or whether the list is displayed in a drop-down.