Creation of icon in alv toolbar

Hi All,

i need to create a icon in alv toolbar.

But i have not created any 'Z' program.

i have created one function module, through that function module i am displaying the ALV grid.

when i am copying the standard pf-status it is asking for program name. but i am using only the function module.

pls help me on this for creating the icon in alv toolbar.

thanks in advance.