regarding the transfering the internal table to memory

hi,

this is my requirement

in the alv_grid_display_output,iam selecting the records by using the checkbox that is present for the each record.

after selecting the records,when i press 'update' button it has to call a module pool screen and what ever may be the selected records to be trasnfered to the screen.

please provide the code for this requirement.

thanks in advance