Abstract: A Dynakey Screen Generator (DSG) is disclosed which is a graphical user interface prototyping and specification tool. DSG is a Microsoft Windows-based tool for prototyping and specifying a graphical user interface having dynamic keys. More specifically, the present invention preferably is a Microsoft Visual Basic application and preferably uses an underlying Microsoft Access database. Advantageously, the present invention allows a user interface designer (the “author”) to enter design specifications into forms. The design specifications cover the general, visual style of the user interface being designed, as well as the specific design of each screen. Once the specifications (stored in the Access database) have been entered, an “end user” (e.g., interface designer, developer, customer, potential end user) can immediately “run” the specification as an interactive prototype.