Abstract: A graphical user interface permits a user to graphically designate a range within data files as input to operations that manipulate the data and permits the user to graphically represent operations that thereafter can be selected for execution. In this way, a user can graphically designate a range of records within a data file on which a desired data manipulation operation will occur and can graphically represent the desired data manipulation operation with a single icon that can be selected for execution.

Abstract: A graphical user interface (GUI) application program implemented in an object oriented programming language permits a user to instantiate new program objects by dragging an instantiation object from one GUI window to a new GUI window and dropping the instantiation object in the new window. When the instantiation object is dropped into the new window, an object specified by the new window type is automatically instantiated. If needed, the user is automatically prompted to provide parameters needed for the object instantiation according to the window in which the object is dropped.