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 = newUri("http://192.0.0.100/jpg/image.jpg");
WebClient wc = newWebClient();
wc.Credentials = newNetworkCredential("MyUser", "MyPassW0rd");
wc.DownloadFile(test, @"C:\TakePicture\picFromWS.jpg");
wc.Dispose();