Hi, you can use this sample to fill your list box.
DEFINE FILE SCO_PROCESSES
D_PRID/A10 = TRIM('B',FTOA(PROCESSES_ID,'(F10)',D_PRID),10,' ',1,'A10');
D_DESC/A100 = '<option value="'||D_PRID||'">'||PRO_CODE||'</option>';
END
TABLE FILE SCO_PROCESSES
PRINT
D_DESC
BY PRO_CODE NOPRINT
ON TABLE...