How to add custom protocol to Vista "Set Associations" list?

Question

I've registered custom protocol "xyz" on Windows Vista:
HKEY_CLASSES_ROOT\xyz = "URL:Extensions Protocol"
It works OK with my application.

Open "Control Panel -> Programs -> Default Programs -> Set Associations", scroll the list to the end. Here is the list of protocols. I would like to see my custom protocol associated with my application.

Answer 1

Look here

http://msdn.microsoft.com/en-us/library/aa767914.aspx?info=EXLINK

Answer 2

take a look

http://msdn.microsoft.com/en-us/library/cc144109%28VS.85%29.aspx#client_typespecific_information