Dynamic search help.

Hi expert...
am facing a problem in my program.
am having 4 fields in my screen,

i want to have dynamic search help in the first field(process code,see image) only when i click 'flag' button (i.e display<>edit ) .

actually i have written a program,but my problem is when i select value from search help,i want the value to display on all fields,currently it displaying on the 1st field only.

Am giving my code here, please help me..

FLOW LOGIC:

PROCESS BEFORE OUTPUT. MODULE status_0101. PROCESS AFTER INPUT. MODULE screen_0101. PROCESS ON VALUE-REQUEST. FIELD ZGEN_PRO_TAB-PRO_CODE MODULE MOD_POV. MODULE mod_pov INPUT. IF flag = 'X' AND sy-ucomm = 'FLAG'. CALL FUNCTION 'F4IF_FIELD_VALUE_REQUEST' EXPORTING tabname = 'ZGEN_PRO_TAB' fieldname = 'PRO_DESCRIPTION' searchhelp = 'ZPROCESS' TABLES return_tab = t_return1. SELECT SINGLE * FROM zgen_pro_tab INTO i_dshlp1 WHERE pro_code = t_return1-fieldval. zgen_pro_tab-pro_code = i_dshlp1-pro_code. zgen_pro_tab-pro_description = i_dshlp1-pro_description. zgen_pro_tab-pro_class_descr = i_dshlp1-pro_class_descr. zgen_pro_tab-pro_doc_class = i_dshlp1-pro_doc_class. ENDIF. ENDMODULE. " MOD_POV INPUT t_return1 contains only code value,please help.