ALV grid new button

Hi Gurus,

I make an alv with  cl_gui_alv_grid I'd like to disable the alv original toolbar and I'd like to add one new button.

How can I do this?

Now I made this:

DATA: lt_toolbar      TYPE ttb_button.

class lcl_alv_grid  DEFINITION create public INHERITING FROM cl_gui_alv_grid.
   PUBLIC SECTION.
     methods m1.
endclass.

class lcl_alv_grid IMPLEMENTATION.
     method m1.

       CALL METHOD  SET_TOOLBAR_BUTTONS
       EXPORTING

         TOOLBAR_TABLE = lt_toolbar.

     ENDMETHOD.
endclass.

If I CREATe the local class before my Creat Object cl_gui_custom_container, my toolbar is apering but the alv is not If I create the my object after cl_gui_custom_container the alv grid is showed well but my toolbar is not.

Do you have any idea/ hint?

If you have other way to make button to alv please say this!

Really Thanks,

Mark