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ABAP Keyword Documentation → ABAP − Reference → User Dialogs → Screens → ABAP Statements for Screens →Syntax
LOOP AT SCREEN INTO wa.
...
ENDLOOP.
Effect
The statements LOOP AT SCREEN ... ENDLOOP define a loop around a statement block. For every screen element of the current dynpro to which a dynpro field is assigned, one loop pass is executed. wa can be specified as:
After the statement LOOP, the work area contains the properties of the screen element in question.
When a table control or a
step loop is processed (that is, within a LOOP of the
dynpro flow logic),
the current properties are determined for its screen elements in the current row or group. Outside of
the processing of a table control or step loop, the statically predefined properties of all rows or groups are determined for its screen elements.
Notes
Example
See Dynpros, Dynamic Screen Modification.