[C#]Enable UAC Shield icons and run as administrator

#region Private Method
private static bool AtLeastVista()
{
    return (Environment.OSVersion.Platform == PlatformID.Win32NT && Environment.OSVersion.Version.Major >= 6);
}

private static void SetButtonShield(Button btn, bool showShield)
{
    if (!AtLeastVista())
        return;

    btn.FlatStyle = FlatStyle.System;
    SendMessage(new HandleRef(btn, btn.Handle), BCM_SETSHIELD, IntPtr.Zero, showShield ? new IntPtr(1) : IntPtr.Zero);
}
#endregion</pre>

public static class ButtonExtension { #region DllImport [DllImport(“shell32.dll”, EntryPoint = “#680”, CharSet = CharSet.Unicode)] private static extern bool IsUserAnAdmin();

[DllImport("user32.dll", CharSet = CharSet.Unicode)]
private static extern IntPtr SendMessage(HandleRef hWnd, UInt32 Msg, IntPtr wParam, IntPtr lParam);
#endregion


#region Const
const int BCM_SETSHIELD = 0x0000160C;
#endregion


#region Private Method
private static bool AtLeastVista()
{
    return (Environment.OSVersion.Platform == PlatformID.Win32NT && Environment.OSVersion.Version.Major >= 6);
}

private static void SetButtonShield(Button btn, bool showShield)
{
    if (!AtLeastVista())
        return;

    btn.FlatStyle = FlatStyle.System;
    SendMessage(new HandleRef(btn, btn.Handle), BCM_SETSHIELD, IntPtr.Zero, showShield ? new IntPtr(1) : IntPtr.Zero);
}

private static Form GetWindowForm(Control control)
{
    Control parent = control.Parent;

    if (parent == null)
        return null;

    if(parent is Form)
        return parent as Form;

    return GetWindowForm(parent);
}
#endregion


#region Public Method
public static void EnableShieldIcon(this Button button)
{
    SetButtonShield(button, true);
}

public static void EnableRunAsProcess(this Button button)
{
    button.Click -= new EventHandler(button_RunAsProcess);
    button.Click += new EventHandler(button_RunAsProcess);
} 
#endregion


#region Event Process
private static void button_RunAsProcess(object sender, EventArgs e)
{
    Button button = sender as Button;
    Form form = GetWindowForm(button);

    if (form == null)
        return;

    ProcessStartInfo psi = new ProcessStartInfo
    {
        Arguments = "-justelevated",
        ErrorDialog = true,
        ErrorDialogParentHandle = form.Handle,
        FileName = Application.ExecutablePath,
        Verb = "runas"
    };
    try
    {
        Process.Start(psi);
        form.Close();
    }
    catch (Exception ex)
    {
        MessageBox.Show(ex.Message);
    }
}
#endregion

}

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