Open Windows Program By Pressing A Button On Webpage?

Mar 11, 2010

I develop web app in asp.net, and I want to do some action in windows when press button in the web page,

For example: when you press Messenger button in [URL] windows live messenger will open in your computer,

is this need a protocol so what is it? and what are the classes in .net allocated for that or is there a certain technique to do that ?

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