Question : Decompress a file in VB

I have a simple application that is monitoring an e-mail box.  I'm scanning for e-mails that contain a specific excel attachment.  The problem is some people are zipping (.zip file) the file before sending it.  I need to add some logic to my program to check for a zip file, and then decompress it.  Any suggestions on how to do this with native VB.Net?

Answer : Decompress a file in VB

you can check http://www.emoreau.com/Entries/Articles/2008/08/Introducing-SystemIOPackaging.aspx

but I would go with http://www.codeplex.com/DotNetZip