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    <p>Internet protocols aren't all about browsers.</p> <p><strong>mailto:</strong> causes an action in an email program (e.g. start a new email)</p> <p><strong>ftp:</strong> causes an action in an FTP program (which <em>might</em> be integrated into a web browser or Windows Explorer)</p> <p><strong>gopher:</strong> (well, <a href="http://en.wikipedia.org/wiki/Gopher_%28protocol%29" rel="nofollow">that's</a> not really prevalent anymore)</p> <p><strong>myapp://</strong> will cause your (C#) app to start running. At that point, it can do anything a C# app can do. One thing it could choose to do is create a .html file on disk, and use</p> <pre><code>Process.Start("file://Path/To/My.html") </code></pre> <p>to cause the default web browser to open the document it just created.</p> <p><strong>UPDATE</strong></p> <p>You can certainly have your myapp:// protocol handler send an update to the web server that hosts the page in question. My assumption here is that the myapp:// handler is running on a client machine, and there is a web server on a different URL <a href="http://mydomain.com" rel="nofollow">http://mydomain.com</a> serving a page that includes a myapp:// reference.</p> <ol> <li>Web server renders a page that includes both a myapp:// URL and Ajax code to periodically query the web server for updates to part of the HTML body.</li> <li>User clicks the myapp:// URL</li> <li>Protocol handler runs</li> <li>Protocol handler sends an update to the web server, e.g. <code>http://mydomain.com?user=joe&amp;result=123</code></li> <li>Web server uses <code>?user=joe&amp;result=123</code> to update response next time the Ajax callback is initiated</li> <li>Ajax callback gets updated data for page from web server, updates page.</li> </ol>
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    1. POGet custom protocol response
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    1. COAnd is it possible to print result to the same window from where was the request sent. To force for example: myapp:index to have the result in its body.
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      1. USRené Beneš
    2. COIt depends on the protocol. If it's built into the browser, and the mechanism used to run the handler provides a way to pass data back, then it can. If it just starts the application in the OS's standard way, there's no communication path back to the browser.
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    3. COSo there is no way getting this thing done?
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