hi,
do like this,hope it will solve u r requirement...
Form_top_of_page.
CLEAR wa_listheader.
REFRESH it_listheader.
wa_listheader-typ = 'H'.
wa_listheader-info = 'Customer Details '.
APPEND wa_listheader to it_listheader.
clear wa_listheader.
wa_listheader-typ = 'S'.
wa_listheader-key = 'Customer Number : '.
wa_listheader-info = lv_aufnr.
APPEND wa_listheader to it_listheader.
clear wa_listheader.
CALL FUNCTION'REUSE_ALV_COMMENTARY_WRITE'
EXPORTING
IT_LIST_COMMENTARY = it_listheader.
REFRESH it_listheader.
endform.
pass this FORM name in REUSE_ALV_GRID_DISPLAY..
like below...
CALL FUNCTION'REUSE_ALV_GRID_DISPLAY'
EXPORTING
* I_INTERFACE_CHECK = ' '
* I_BYPASSING_BUFFER = ' '
* I_BUFFER_ACTIVE = ' '
I_CALLBACK_PROGRAM = sy-cprog
* I_CALLBACK_PF_STATUS_SET = ' '
* I_CALLBACK_USER_COMMAND = ' '
I_CALLBACK_TOP_OF_PAGE = 'TOP_OF_PAGE'
* I_CALLBACK_HTML_TOP_OF_PAGE = ' '
* I_CALLBACK_HTML_END_OF_LIST = ' '
* I_STRUCTURE_NAME =
* I_BACKGROUND_ID = ' '
* I_GRID_TITLE =
* I_GRID_SETTINGS =
IS_LAYOUT = wa_layout
IT_FIELDCAT = it_fcat
* IT_EXCLUDING =
* IT_SPECIAL_GROUPS =
* IT_SORT = it_sort
* IT_FILTER =
* IS_SEL_HIDE =
* I_DEFAULT = 'X'
* I_SAVE = ' '
* IS_VARIANT =
IT_EVENTS = it_events
* IT_EVENT_EXIT =
* IS_PRINT =
* IS_REPREP_ID =
* I_SCREEN_START_COLUMN = 0
* I_SCREEN_START_LINE = 0
* I_SCREEN_END_COLUMN = 0
* I_SCREEN_END_LINE = 0
* I_HTML_HEIGHT_TOP = 0
* I_HTML_HEIGHT_END = 0
* IT_ALV_GRAPHICS =
* IT_HYPERLINK =
* IT_ADD_FIELDCAT =
* IT_EXCEPT_QINFO =
* IR_SALV_FULLSCREEN_ADAPTER =
* IMPORTING
* E_EXIT_CAUSED_BY_CALLER =
* ES_EXIT_CAUSED_BY_USER =
TABLES
T_OUTTAB = it_final.