Check program DEMO_SEL_SCREEN_FUNCTION_KEY.
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TABLES sscrfields.
PARAMETERS: p_carrid TYPE s_carr_id,
p_cityfr TYPE s_from_cit.
SELECTION-SCREEN: FUNCTION KEY 1,
FUNCTION KEY 2.
INITIALIZATION.
sscrfields-functxt_01 = 'LH'.
sscrfields-functxt_02 = 'UA'.
AT SELECTION-SCREEN.
CASE sscrfields-ucomm.
WHEN'FC01'.
p_carrid = 'LH'.
p_cityfr = 'Frankfurt'.
WHEN 'FC02'.
p_carrid = 'UA'.
p_cityfr = 'Chicago'.
ENDCASE.
START-OF-SELECTION.
WRITE / 'START-OF-SELECTION'.
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