Simple Modal Password Dialog

FROM : Arthur Coleman
DATE : Fri Jul 25 21:40:32 2008

I know that I must be missing something simple, but I have been unable 
to figure out how to password protect a simple application that I'm 
writing.  I create an new xib file add a panel and I'm able to come up 
after my app loads but I haven't been able to figure out how to make 
the dialog modal.  I'm sure there must be some easy way to do this 
since I see it on so many applications.

Thanks for any help,

Arthur