LOOP AT SCREEN - ABAP Keyword Documentation

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LOOP AT SCREEN

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:

an existing work area of the data type SCREEN from ABAP Dictionary,
an inline declaration DATA(var), where a work area of the type SCREEN is declared.

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

The statement LOOP AT SCREEN behaves like the statement LOOP in a loop across an internal table, where a system table is used instead of an internal table.
This statement also has an obsolete short form, which works with an obsolete predefined structure screen.
Do not specify the obsolete predefined structure screen explicitly after INTO.

Executable Example

Dynpros, Dynamic Screen Modifications

Continue
The Structure SCREEN
MODIFY SCREEN
Example

Screens, Dynamic Screen Modification