Currently I am working on a project in which I have to send commands to a device by calling its IP address. I have already created a code that send the command by using the IP address on LAN. Here is code snippets.

private void cmdConnectRobot_Click(object sender, EventArgs e)
{
    try
    {
        // Create object and connect with VRC
        caoCtrl = caoWs.AddController("Robot", "CaoProv.DENSO.RC8", "", "Server=192.168.0.100");

        caoRobot = caoCtrl.AddRobot("VS", "");

        // Valiable of status of Machine lock SW
        //caoVal = caoCtrl.AddVariable("@LOCK","");
        caoValP = caoCtrl.AddVariable("P1", "");

you can see the robot can be accessed using LAN by putting server IP address. I want to call this device by using this IP address but over the internet. Thank you!