[RESOLVED] Run your program when clicking a link?

[DigiRev]

Yahoo! Messenger had this feature. When clicking a link in a web browser, it pointed to something like:

ymsg:user

ie:

<a href="ymsg:user">Send an instant message</a>

Which would then run Yahoo! Messenger and open an instant message to that user.

I want to have the same thing in mine. I've seen code on www.pscode.com/vb before but I can't find it. I remember it was something in the registry.

Does anyone know or have any ideas? I basically just want them to click a link like that and have it execute my program.



Edit: Here is an example:
http://profiles.yahoo.com/danny.guitar

Below my picture, you can see the smiley face and "Send IM" link. It points to ymsgr:sendIM?danny.guitar.

And after searching the registry, I found "ymsgr" in:
HKEY_CURRENT_USER\Software\Classes\callto\shell\open\command
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\ymsgr