The Guessing hint box shows a list of items. As the user types the desired choice in the edit control at the top of the box, the list scrolls to the closest match and highlights it.
What is displayed in the edit control as the user types is merely a hint. When the OK button is selected, the currently highlighted value is sent to the program.
A selection may also be found by using the scroll bars and clicking on the desired choice.
By using this method for choosing values, only valid choices may be made, even when there are many, many options to choose from.
