M$XP and sounds

I have all sounds turned off in the control panel. I have the volume control muted. And yet MS Outlook is beeping at me every time an email message comes in. Where is the setting to turn that off? I want the little popup dialog, I do not want noises.

We hates noises coming out of our computer, we does.

ETA: Thanks all, I found it. Three dialogs down in the MS Outlook Tools/Options. :-/