ABAP Keyword Documentation →  ABAP - Quick Reference 

LOOP AT SCREEN - Quick reference

Reference

Other versions: 7.31 | 7.40 | 7.54

Syntax

LOOP AT SCREEN INTO wa. 
  ... 
ENDLOOP. 

Effect

Reads the properties of the screen elements of the current dynpro in a loop and assigns the results to a work area wa of the structure SCREEN.