Here is my simple sample. You only need to specify the image. Hope this can helps.

Regards,
Handy

How can this be accomplished upon page_load using .NET C# statements -- instead of client side javascript. 

I assumed the following would work, but it did not:

ISNet.WebUI.WebDesktop.WebDesktopWindow window = new ISNet.WebUI.WebDesktop.WebDesktopWindow();
            window.Name = "wndTest";
            window.Text = "Window Text";
            window.ContentMode = ISNet.WebUI.WebDesktop.ContentMode.UseIFrame;
            window.ContentURL = "/Error.aspx";
            window.ClientVisible = true;
            WebDesktopManager1.Windows.Add(window);
            ISNet.WebUI.WebDesktop.WebDesktopShortcut shortcut = new ISNet.WebUI.WebDesktop.WebDesktopShortcut();
            shortcut.Name = "Sample Shortcut";
            shortcut.ToolTip = "Tooltip Text";
            shortcut.TargetURL = "/Welcome.aspx";
            shortcut.Image = "icon.ico";
            shortcut.Visible = true;
            shortcut.WindowName = "wndTest";
            WebDesktopManager1.ShortcutIcons.Add(shortcut);


        }

Hello,

If you want to use C# code, you will need to use on page_load or FullPostback.

e.g Here is my code that i used on my sample and it worked at my end.

protected void Page_Load(object sender, EventArgs e)
    {
        WebDesktopShortcut shortcut1 = new WebDesktopShortcut();
        shortcut1.Name = "Shortcut";
        shortcut1.Text = "Shortcut";
        shortcut1.Image = "~/images/1.gif";
        shortcut1.TargetURL = "http://www.google.com";
        shortcut1.ToolTip = "";
        shortcut1.WindowName = "wdShorCut";
        shortcut1.TargetControlBoxImage = "~/images/2.gif";
        WebDesktopManager1.ShortcutIcons.Add(shortcut1);
        WebDesktopManager1.ShortcutIconsVisible = true;
    }

Hope this helps.

Regards,
Handy