1. A display system, comprising: a display; a processor; an application program interface coupled to the display, wherein the interface comprises: a uimanager which contains code which, when executed by the processor, generates either a default image or an image that is user-defined; a first pointer which points to the code for generating the default image having a first look and feel during a first time in which an application program is executed by the application program interface; and a second pointer which points to the code for generating the user-defined image having a second look and feel during a second time in which the application program is executed by the application program interface.