>I need to incorporate ftp into an existing app... please let me know what you use. I would like something that uses the built in functionality of windows, but will look at all options. I have done this in the past, but I would like to know what is being used now.

The new class was released recently in Downlods section here. That's the original class by Robert Abram taken by Martin Jindra. I haven't looked into it, but I used Robert Abram's class in the past.