ActionScript 2.0 :: Check If Camera Exists?

I want to add the possibility to take a webcam picture to my project, but only if the user's system has a webcam installed (obviously). In other words, those without a webcam should not notice the new function at all.

So basically, I need to check if a webcam exists on the user's computer.

I found a couple of ways to accomplish this, but none seem to work when I test them on a webcam-less system.

* One way to detect the presence of a webcam is to check if (Camera.names.length > 0).

However, on my 'blind' (webcam-less) computer, Camera.names.length returned 1 nonetheless.

* The other is to check if (Camera.getCamera() != null).

If I understand it correctly, 'getCamera' is specific to Actionscript 3. My whole project is in Actionscript 2, I'm afraid it's too late to switch. The AS2 equivalent would be (Camera.get() != null). But I tested that on my 'blind' system and again, it didn't return null.

In short, both these methods indicated the presence of a webcam where there was none.

So my question is:

Is there a really foolproof way to detect the presence/absence of a webcam in Actionscript 2? Before the 'allow/deny' dialog pops up?