Syntax	GUI.SetDefault (widgetID : int, default : boolean)
Description	Sets the "default status" of a button specified by widgetID. If a button is the default button, then it is drawn with a heavy outline and it is activated when the user presses ENTER. Only one button can be the default button per window. If a button is set to be the default button, then the previous default button has its "default status" removed.
Status	Exported qualified. This means that you can only call the procedures by calling GUI.SetDefault, not by calling SetDefault.
See also	GUI.CreateButton.