Scroll bars on table controls.

Hi,

In module pool programming, I have a screen on which I have 3 table controls. The problem is how do I get vertical scroll bars for these table controls?

I am displaying ths screen in the web. In the web I observe that there are buttons for move up, move previous, move first and move last. I havent put these buttons, they seem to appear by default.

How do I add function codes (sy-ucomm or ok_code) for these buttons.

Thanks and Regards,

Mick