What tool is used to create a graphical user interface for a program?

A GUI Builder is specifically designed to facilitate the creation of graphical user interfaces by providing a visual interface to design the layout and components of the GUI, such as buttons, text boxes, and menus. This tool allows developers to drag and drop components onto a workspace, making it easier to see how the final interface will look and function without needing to manually code each element.

Although an IDE (Integrated Development Environment) can include features to build GUIs, its primary function is to provide a comprehensive environment for writing, debugging, and testing code. A GUI Editor might refer to software that allows for adjustments to existing graphical user interfaces but does not necessarily focus solely on the creation aspect. A Code Compiler, on the other hand, translates source code into executable code but does not involve any aspects of GUI design. Thus, the GUI Builder is the most appropriate choice as it is specifically tailored for creating graphical user interfaces.