xbee Pro S2B & xbee pro shield

Hello !
i just need to get start with xbee , i bought two (pro Sxbee 2B) and two (xbee pro shields) , i want to know how to communicate two arduino uno together by using (xbee pro s2b)
i don't know how to configure it or how to use it perfectly
i need an guide or easy examples to learn how to communicate two arduino uno by xbee can any one help me please ?!
thanks

why no one replay ?
Can any one help me please
just guide me