Windows 7: How to connect two computers via a wifi modem?

I have a desktop computer connected to a wireless modem through an ethernet cable. My laptop is connected to the modem using wifi. Is there any way to connect the two computers?
This my network map:

Thanks in advance
-Ramchan

Welcome to Seven Forums,

If you wish to have the 2 computers communicate and do files/printer sharing and both computers have Windows 7 (I'm assuming), you may setup a Homegroup.
HomeGroup - Microsoft Windows

Please let us know if this is what you wish to accomplish or not.

Thanks 2xg for the response

The problem is that I can't able to see the other computer in the network. But i can see it in the network map...
I want to know that the connection between the computers is possible or not.
Sorry for the late reply,,,

Is the "Modem" you are connecting to actually a "Router"? It would need to be a router and the two PCs need to have IP addresses in the same Subnet, for example addresses of 192.168.1.2 and 192.168.1.3 (the router would probably have the first address in the Subnet of 192.168.1.1).

Hello mgmcc, thanks for the response..

Yes, my modem is a router and has the ip address as u mentioned above.