How to Download all files using FTP from a VS 2008 VB project

I am starting a new VS @008 Visual Basic WIndow Forms project. I would like to be able to periodically check a FTP server and download any files in a specified directory to a local directory. Once downloaded the project would need to delete those files from the FTP server. The downloaded files would then be processed locally. Later the VB project would perform the same actions.
I have found a couple of tutorials on downloading single files whose name is known. Can someone help with how to first Download all the files in a directory and then delete those files?
thanks,
pat