A system and method for automatically (i.e., programmatically) generating a computer program based on program information, such as a prototype, wherein the program includes a graphical user interface (GUI) for specifying input values to or viewing output values from the program. The prototype may comprise a series of functional operations. One or more input and/or output parameters may be associated with each functional operation. In response to a user's request for a program implementing the prototype to be automatically generated, a list of parameters associated with the operations included in the prototype may be displayed. The user may select from the displayed list the input parameters which are desired to be interactively changeable. In response, the program may be generated such that the program has a graphical user interface including a user interface control associated with each selected input parameter.