How to remove white spaces with GUI_Download FM

Hi Gurus,

I need to download my text file using GUI_DOWNLOAD FM without leading white spaces, can u pls advice me.

I am giving the code I am using below.

-

CALL FUNCTION 'GUI_DOWNLOAD'

EXPORTING

• BIN_FILESIZE =

filename = l_filename

• filetype = 'ASC'

• APPEND = ' '

WRITE_FIELD_SEPARATOR = 'X'

• HEADER = '00'

TRUNC_TRAILING_BLANKS = 'X'

• WRITE_LF = 'X'

• COL_SELECT = ' '

• COL_SELECT_MASK = ' '

• DAT_MODE = ' '

• CONFIRM_OVERWRITE = ' '

• NO_AUTH_CHECK = ' '

• CODEPAGE = ' '

• IGNORE_CERR = ABAP_TRUE

• REPLACEMENT = '#'

• WRITE_BOM = ' '

• TRUNC_TRAILING_BLANKS_EOL = 'X'

• WK1_N_FORMAT = ' '

• WK1_N_SIZE = ' '

• WK1_T_FORMAT = ' '

• WK1_T_SIZE = ' '

• WRITE_LF_AFTER_LAST_LINE = ABAP_TRUE

• SHOW_TRANSFER_STATUS = ABAP_TRUE

• IMPORTING

• FILELENGTH =

TABLES

data_tab = gt_temp

• FIELDNAMES =

EXCEPTIONS

FILE_WRITE_ERROR = 1

NO_BATCH = 2

GUI_REFUSE_FILETRANSFER = 3

INVALID_TYPE = 4

NO_AUTHORITY = 5

UNKNOWN_ERROR = 6

HEADER_NOT_ALLOWED = 7

SEPARATOR_NOT_ALLOWED = 8

FILESIZE_NOT_ALLOWED = 9

HEADER_TOO_LONG = 10

DP_ERROR_CREATE = 11

DP_ERROR_SEND = 12

DP_ERROR_WRITE = 13

UNKNOWN_DP_ERROR = 14

ACCESS_DENIED = 15

DP_OUT_OF_MEMORY = 16

DISK_FULL = 17

DP_TIMEOUT = 18

FILE_NOT_FOUND = 19

DATAPROVIDER_EXCEPTION = 20

CONTROL_FLUSH_ERROR = 21

OTHERS = 22

.

• IF sy-subrc <> 0.

• MESSAGE ID SY-MSGID TYPE SY-MSGTY NUMBER SY-MSGNO

• WITH SY-MSGV1 SY-MSGV2 SY-MSGV3 SY-MSGV4.