Data Warehousing sql server 2008

ya, what i need is to create a data warehouse using sql server 2008. In there actually i need to know how can i create data marts or cubes in a warehouse. i dont have any clear idea about how to create such a cube. So if you can show me some example work then i can easily understand the process. for further clearance;

create db.....
create warehouse....
create cubes.....
etc....


Thanks,

post your question little bit elaborate..