Help with Updating program versions

[Tor Lund]

i would like to know if the is any way to update an win applikation over the
internet. the main idea is: when i code a new version of a program then i
can "upload" it to my clients whithout their acknowlede...i have heard it is
possible with .net but i dont know what to look for. can anybody help me out
:))

Tor Lund