Open Panel Control with TestComplete

Now that we know what you are doing, you can use command prompt which is easier to automate. See Set static IP address on Windows 10 from Command Prompt, you can use the command "netsh" and invoke the command and get the output like so,

function Test()
{
    var oExec = WshShell.Exec("netsh interface ip set address name=\"Ethernet1\" static 10.1.4.220 255.255.255.0 10.1.4.1");
    while (oExec.Status == 0) {
        aqUtils.Delay(1000);
    }
    while (!oExec.StdOut.AtEndOfStream) {
        Log.Message(oExec.StdOut.ReadLine());
    }
}