Defining Processing Blocks

Hi all ,

i m reading an examples of Defining Processing Blocks , not understanding the meaning of SET EXTENDED CHECK OFF

1_Non-Executable Event Blocks_

REPORT demo_abap_events_1.

SET EXTENDED CHECK OFF.

WRITE / 'Anweisung 1'.

FORM routine.

WRITE / 'Unterprogramm'.

ENDFORM.

• Syntax error in Unicode Systems:

• WRITE / 'Anweisung 2'.

• PERFORM routine.

• WRITE / 'Anweisung 3'.

2)_Executable Event Blocks_

REPORT demo_abap_events_2 .

SET EXTENDED CHECK OFF.

WRITE / 'Anweisung 1'.

FORM routine.

WRITE / 'Unterprogramm'.

ENDFORM.

START-OF-SELECTION.

WRITE / 'Anweisung 2'.

PERFORM routine.

WRITE / 'Anweisung 3'.

3)Executable Event Blocks

REPORT demo_abap_events_3 .

SET EXTENDED CHECK OFF.

START-OF-SELECTION.

WRITE / 'Anweisung 1'.

WRITE / 'Anweisung 2'.

PERFORM routine.

WRITE / 'Anweisung 3'.

FORM routine.

WRITE / 'Unterprogramm'.

ENDFORM.

Plz explain..these program working

Definitely rewards pts.

Best Regrds,

Savita