A text box, text fiel or text entry box is a common element of graphical user interface of computer programs, as well as the corresponding type of widget used when programming GUIs. A text box's purpose is to allow the user to input text information to be used by the program. User-interface guidelines recommend a single-line text box when only one line of input is required, and a multi-line textbox only if more than one line of input may be required. Non-editable text boxes can serve the purpose of simply displaying text.