My idea.

Have a folder on the network that only a couple of administrators have
write access to.
Create an app which, using impersonation, will allow a user to put
files in this folder (and the app will basically create backup files
for any files being overwritten).

I already wrote this app in c# and it works great.
But the user has to know that this app exists, and has to have a
shortcut to it, in order to use it (which is ok).

But I was thinking it would be really cool if upon dropping a file into
this restricted folder, the app would just launch right then and there
for the user. I just don't have any idea how to do go about figuring
out how to do this.

Any help would be greatly appreciated.

Thanks,
Mike