Below code snippet is useful to find IP address of a system. It is based on Sys_execute command.

[+] public String GetIpAddress(String sMachineName)
    [ ] //To get IP Address for the particular machine in Network
    [ ] List of String lsOutput
    [ ] String sCommand
    [ ] String sTemp, sItem
    [ ] String sResult = NULL
    [ ] Boolean bResult = FALSE
    [ ] Integer iPos1, iPos2
    [ ]
    [ ] sCommand = "ping -a {sMachineName}"
    [ ] Sys_Execute (sCommand,lsOutput)
    [ ]
    [ ] //ListPrint (lsOutput)
    [-] for each sItem in lsOutput
        [-] if (MatchStr("*pinging*", sItem))
            [ ] bResult = TRUE
            [ ] break
        [ ]
    [-] if (bResult)
        [ ] iPos1 = StrPos ("[", sItem)
        [ ] iPos2 = StrPos ("]", sItem)
        [-] if ((iPos1 > 0) && (iPos2 > 0))
            [ ] sResult = SubStr(sItem,iPos1+1, iPos2-iPos1-1)
            [ ] Print ("Found IP Address: {sResult}")
    [ ] return sResult