"when i want to connect to a computer via the web i use dns2go to know their ipaddress. I know that its possible to launch an extern application via vfp. But i want to know if its possible to intercept the returnd address (for ex : 192.156.1.2). "
You can use winsock + VFP to do all above. Here is a link where to check winsock basics
http://www.winsockvb.com/AT