There are definitely other ways to do this, but you can find a quick example in my DNNSimpleArticle module's ArticleView control (and code behind)

Basically I inject a literal control into a placeholder control. you could do the same, putting the code you want on the page in that literal

http://dnnsimplearticle.codeplex.com/...

plArticleTitle.Controls.Add(new LiteralControl(curArticle.Title));
plArticleBody.Controls.Add(new LiteralControl(Server.HtmlDecode(curArticle.Body)));