To create Heading line in an excel sheet, the parameter "fieldnames " works fine if the internal table is created like :
DATA : BEGIN OF itab OCCURS 0,
field_name(20),
END OF itab.
but we are restricted to use internal tables without header line, we have to use external work area... Is the anyother way to pass the contents for ' filednames' parameter of TABLES type?
CALL FUNCTION 'GUI_DOWNLOAD'
EXPORTING
filename = l_path
filetype = 'ASC'
append = 'X'
write_field_separator = 'X'
HEADER = ' '
write_lf = 'X'
dat_mode = 'X'
confirm_overwrite = 'X'
TABLES
data_tab = i_output
fieldnames = itab