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What are the event key words in interactive reporting ? Event keyword Event AT LINE-SELECTION Moment at which the user selects a line by double-clicking on it or by positioning the cursor on it and pressing F2. AT USER-COMMAND Moment at which the user presses a function key. TOP-OF-PAGE DURING LINE- SELECTION Moment during list processing of a secondary list at which a new page starts. What is secondary list ? Secondary lists allow you to enhance the information presented in the basic list. The user can, for example, select a line of the basic list for which he wants to see more detailed information. You display these details on a secondary list.Secondary lists may either overlay the basic list completely or you can display them in an extra window on the screen. The secondary lists can themselves be interactive again. How to select valid lines for secondary list ? To prevent the user from selecting invalid lines, ABAP/4 offers several possibilities. At the end of the processing block END-OF-SELECTION, delete the contents of one or more fields you previously stored for valid lines using the HIDE statement. At the event AT LINE-SELECTION, check whether the work area is initial or whether the HIDE statement stored field contents there. In the latter case, create a secondary list, since you previously stored field contents for valid lines only. After processing the secondary list, clear the work area again. This prevents the user from trying to create further secondary lists from the secondary list displayed. How to create user interfaces for lists ? The R/3 system automatically generates a graphical user interface (GUI) for your lists that offers the basic functions for list processing, such as saving or printing the list. If you want to include additional functionality, such as pushbuttons, you must define your own interface status.To create a new status, the Development Workbench offers the Menu Painter. With the Menu Painter,you can create menus and application toolbars.And you can assign Function keys to certain functions. At the beginning of the statement block of AT END-OF-SELECTION, activate the status of the basic list using the statement: SET PF-STATUS 'STATUS'. Can we call reports and transactions from interactive reporting lists ? YES.Interactive reporting also allows you to call transactions or other reports from lists. These programs then use values displayed in the list as input values.The user can, for example, call a transaction from within a list to change the database table whose data is displayed in the list.