two page smartform

hi all

i want to know if in my window there are more records than the window lenggth

then wil it leads to the second page of the smart form

or it is mandatory to command the next page

if it is

then please telll me how to show data in two pages and in three pages and in four pages and on.....

if the data is displayed in four pages then shud i create four pages in the smart form???

plz help

and also tell how i wil come to know that i have to create a new page as the records in the database are not known at runtime..

plz help

any help wil b appreciated

thanx