Using HTTPS and httpWebRequest

I am sending httpwebrequests to the paypal api server and this uses https. I did the normal things that you normally do with http requests, and it worked. Do I need to do anything special to properly use https, or is specifying https in the request URL enaugh to make it work?

URLReferrer is null when page is HTTPS

We use the URLReferrer and a code passed in on the query string to produce online videos so that only our paid clients can link to our video playback page. This system has worked well for some time. I know the URL referrer can be spoofed, but who would tell their clients to do such a thing to access a video ? It’s worked well for us.