class cl_gui_alv_grid

hi,

i have developed a report using module-pool, in that i have used container for displaying ALV grid format, for this i have used class cl_gui_alv_grid and container of type cl_gui_custom_container i.e:

DATA: g_custom_container TYPE REF TO cl_gui_custom_container,

alv_grid TYPE REF TO cl_gui_alv_grid.

problem is i am not able to download data into excel using the button that comes on the ALV grid container.

How to do that Pls help.

Its urgent.