C#作ACTIVEX时在网页上用如何用paramname传参数

[InterfaceType(ComInterfaceType.InterfaceIsDual)]
    public interface ICOMControl
    {
        string IP { set;get; }
     }

public partial class JXPMaxHikClient : UserControl,  ICOMControl
    {
private string _IP;
        public string IP
        {
            set
            {
                _IP = value;
            }
            get
            {
                return _IP;
            }
        }

...........

}

外部传值IP，内部调用 _IP