Microsoft used to have a script-encoder. Check out microsoft.com/scripting.

Edited: Found the encoder here. CHeck it out. It sorta works.

I have to agree with Slarty on the best way to protect your source code. I have seen a couple of solutions like that. They are easily crackable if you know some basic scripting but it takes stops most people from bothering.

I can't see why you'd wanna hide your source anyway? The way I figure source should never be hidden. There simply are no valid reasons for it.