Reg.. Modifying an ALV

Hi Experts,

I have an ALV report, in which i need to modify a row i.e....

i have displayed the report i need to modify the date and quantity fields.

How do i capture the modified data (i.e...edit data like date, qty) into another internal table....

can any one help me with the answers...

Answers will be rewarded......

Regards,

Kumar