Question : Using Real VNC, how do I disable the icon in the tray.

I want to use VNC 4, but it leaves itself vulnerable to users by allowing them to click on the icon in the tray.  The user can then change the password to anything he wants, thus blocking me out.  Is there a disable feature that you know of for this?

Answer : Using Real VNC, how do I disable the icon in the tray.

I've done the process that I've mentioned with Tight VNC and UltraVNC, but I haven't tried it with RealVNC.

However, since they are compatible, you could instead install TightVNC on the client computer (it's basically RealVNC with a few added bells and whistles and it's faster), do the steps that I outlined above and you'll still be able to connect to that machine with a RealVNC client.