Adding pushbuttons on the application toolbar of report selection screen

In the GUI status of the selection screen set by the system, the application toolbar contains five inactive pushbuttons, to which the function codes FC01 to FC05 are assigned. To enable use of the pushbuttons, the statement TABLES must be used to declare an interface work area of the structure SSCRFIELDS from the ABAP Dictionary. If a text is assigned to the component functxt_0n of the interface area sscrfields before the selection screen is called, this text is displayed on the relevant pushbutton. Otherwise, the pushbutton does not contain any text. When the user chooses a pushbutton in the application toolbar, the runtime environment triggers the event AT SELECTION-SCREEN and the corresponding function code is transferred to the component comm of the interface work area sscrfields. After the event block after AT SELECTION-SCREEN is processed, the system returns to the display of the selection screen.