interactive programing in ALV

Dear friends,

I have created one trans. table in that material no. and month are two fields i have created one report to display that field now when user click on that material no he gets another screen in that again user have to enter the same material no and month and the quantity now how to get that material no and month on the next screen automatically so that user can entered only qantity go ahead. when user click on material number then automatically that material number and month can appered in the next screen of that same fields.

Please guide me

Thanks,

Vishal Bhagwat.