Create a report Z_HELLO_WORLD and paste below code into it:

REPORT z_hello_world .

* declare and fill context

DATA gs_context TYPE lvc_s_tabl .

gs_context-value = 'Hello world!' .

* call the form

CALL FUNCTION 'ZXLWB_CALLFORM'

EXPORTING

iv_formname = 'HELLO_WORLD'

iv_context_ref = gs_context

EXCEPTIONS

OTHERS = 2 .

IF sy-subrc NE 0 .

MESSAGE ID sy-msgid TYPE sy-msgty NUMBER sy-msgno

WITH sy-msgv1 sy-msgv2 sy-msgv3 sy-msgv4 .

ENDIF .

Result of the printing program execution