public DwmForm(DwmEffectProvider owner, Form form)
            {
                Form = form;

                if ((form.Site == null) || !(form.Site.DesignMode))
                {
                    Filter = new DwmMessageFilter(owner, this);
                }
            }
 public DwmMessageFilter(DwmEffectProvider owner, DwmForm form)
     : base(form.Form)
 {
     _owner = owner;
     _form  = form;
 }