LoadControl From Windows Application

Is it possible to LoadControl in windows application? I have email generation as web, but I want to move it to windows service for monthly newsletter.

Emails now are implemented as UserControls, in this way html person can easily modify look & feel.

Current rendering implementation looks like:

StringBuilder sb = new StringBuilder(4000);
StringWriter sw = new StringWriter(sb);
HtmlTextWriter htw = new HtmlTextWriter(sw);
Page page = new Page();
EmailTemplateBase emailCtrl = (EmailTemplateBase)page.LoadControl(
"Controls/EmailTempaltes/Template.ascx");
// Exception here
emailCtrl.DataContext = dataContext;
emailCtrl.Parameter = parameter;
emailCtrl.RenderMode = renderMode;
emailCtrl.DataBind();
emailCtrl.RenderControl(htw);
subject = emailCtrl.Subject;
string MessageText = sb.ToString().Replace(" ", "").Replace(Environment.NewLine, "");

return MessageText;