Creating a self extracting zip.

["Straw, Jerry" <Jerry_Straw@xxxxxxxxxx>]

I have several pdf documents that I need to consolidate into a
self-extracting zip file and email to participants.  This all needs to
happen automatically in the back ground.  The only problem I am currently
experiencing is creating the self extracting zip file.  Does anyone know of
any api's (preferably free) that can help me to accomplish this?

Thanks

Jerry Straw