Imprimer une page HTML en c# (sans intervention utilisateur)

Après plusieurs heures de recherche, voici enfin la solution pour forcer le browser à imprimer une page web à partir de VS2005.
Voici le code:

private void PrintHelpPage()
{
 // Create a WebBrowser instance. 
 WebBrowser webBrowserForPrinting = new WebBrowser();

 // Add an event handler that prints the document after it loads.
 webBrowserForPrinting.DocumentCompleted +=
     new WebBrowserDocumentCompletedEventHandler(PrintDocument);

 // Set the Url property to load the document.
 webBrowserForPrinting.Url = new Uri(@"\\myshare\help.html");
}

private void PrintDocument(object sender,
 WebBrowserDocumentCompletedEventArgs e)
{
 // Print the document now that it is fully loaded.
 ((WebBrowser)sender).Print();

 // Dispose the WebBrowser now that the task is complete. 
 ((WebBrowser)sender).Dispose();
}

Source: Microsoft MSDN