How can make a wireless LAN connection pcs on a wireless internet router ?

I have two pcs with wireless adapters and a wireless internet router sharing intrenet connection to them.But how can i make a LAN connection between my pcs?How can make a wireless LAN connection pcs on a wireless internet router ?
cannot be done without a base ISP.How can make a wireless LAN connection pcs on a wireless internet router ?
u need a router which connets both computer then u go to my network place and conet ur othe computer to it