Module Pool Programming

Hi to all,

Suppose one report of classical alv is diaplay 200 lines,

and the user click on the 4th line,

Then another screen will display,

This screen is capable to change the data in ztable,

Now suppose the user has change some of the data

which is displayed on the privious screen also,

now my requirement is that,

when user save the changes and back to the privious screen,

he/she will be able to look the screen with the current data,

that is new data after the chage.

means the screen will be refreshed.

What type of coding is required for this type of program,

as this is combination of classical alv and modulepool program.

Is it possible.

If yes then please guide me.

Thanks in advance.