ABAP Keyword Documentation →  ABAP − Short Reference → 

ON CHANGE OF - Short Reference

Reference

Syntax

ON CHANGE OF dobj [OR dobj1 [OR dobj2] ...].
  statement_block
ENDON.


Effect

Obsolete: Defines a control structure with a statement block statement_block. The statement block is executed if the data object dobj has changed since the pervious execution of the ON CHANGE OF statement.

Addition