how to connect two pc in long distance ...for data sharing & internet,through the router(not wireless) ,it is possible?.if it's possible give the configuration settings ..plz help me ....thanx for ur help.............

Define long distance? Same house different rooms? or different cities? You need to describe your issue with more detail when posting on a forum.

I did a google search for: how to connect 2 pcs

and came up with tons of HOW-TO articles, try google too.

the distance is :1.5km

You will obviously need to go through the internet. The first thing that comes to mind, and probably the easiest is hamachi which is a type of VPN:

http://en.wikipedia.org/wiki/Hamachi

You may also be interested in more info on VPN (bit more complicated):
http://en.wikipedia.org/wiki/Vpn