Question on Masking in Sony Vegas Pro 8

[AznBrotha101]

I'm trying to do masking in Vegas Pro 8 and it seems I'm running into a problem. I know how to get the pen tool working and make it so that I have everything around the path disappear. But what if I want to make everything inside the path disappear and keep everything around it? Cause I'm trying to mask this one person who's arms are at his waste, so there is a space created where you can see behind him. I successfully got everything around him, but those two spaces between his arms still show. Any ideas?

[Mastamind]

Mask the part you want to remove too, then on the left where the mask mode is set to positive, switch it to negative.

[AznBrotha101]

Aha! Haha, thanks for the help.