- SAP applications using the classic screen technology are displayed for the end user using the SAP GUI. The screen can contain a set of predefined elements or GUI controls.
- The SAP GUI is used to display selection screens, messages, and classic lists from an ABAP program on the user’s screen.
- Selection screens are special screens that can be defined without using Screen Painter. When an ABAP program is activated, the ABAP runtime environment activates all of the required screens with all of their parts.
- Messages are short texts that are displayed in a dialog box or in the status line of the current SAP GUI window.
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