Thanks to the wonderful API this camera has, you do not need DLL's or Active X controls. You can just get an image for example by the API.
Here an example to get the image from the camera using c# (this can be used in a service, web service or other applications):
Uri test = new Uri("http://220.127.116.11/jpg/image.jpg");
WebClient wc = new WebClient();
wc.Credentials = new NetworkCredential("MyUser", "MyPassW0rd");