Findout connected devices IP adresses

Revision 2
Hi,

I want to write a vb program to find all connected network devices to my computer.
all devices which is connected to my computer use IPv4 and am trying to find the devices IP adresses.

how can i do?

thanks

Maybe you didnt undrestand whaat i need really,
I need the a list and ip of physical devices which is connected to my computer, not the program and services of local computer