Hello people, I'm new here.

I've searched all over forums and found nothing that can help me, so I decided to ask it .

I have a program, But what I need is, kind of an updater from internet..

E.g: If many people have my program and If I upload a newer version so the people get a messageBox:
There is a new version, (click to download)
Is this possible? If it is!!
Please tell me in a easy way what I need + full Tutorial, I am new &noobie at the moment!