Hi Dear All,
When I go through this tutorial to get the knowledge of ALV, I encounter some issues. Could any one give me some hints. Thank you so much.
I do not find ' Method Call' in Wizard in the method WDDOINIT. 
As the screen shot below, in my code wizard I can not find it.
So I write the codes as in the tutorial, like
DATA: lv_columns TYPE salv_wd_t_column_ref.
DATA: wa_cols TYPE salv_wd_s_column_ref.
CALL METHOD lv_value->if_salv_wd_column_settings~get_columns
RECEIVING
value = lv_columns.
But when I tried to change the color of the column it informs me the error message 'Type "CL_WD_TABLE_COLMUN" is unknown'
LOOP AT lv_columns INTO wa_cols.
CASE wa_cols-id.
WHEN 'MATNR'.
CALL METHOD wa_cols-r_column->set_cell_design
EXPORTING
value = cl_wd_table_colmun=>e_cell_design-one.
ENDCASE.
ENDLOOP.
Regards
Jay