Actually, this works. What I meant was adding some code like this but expecting the control in it to be ASP.NETized:

        ' Find the control to hold the customized page
        loControl = Page.FindControl("LabelDataEntry")

            loControlLabel2 = New System.Web.UI.WebControls.Label
            loControlLabel2.Text = "<tr>" + _
             "<td class=""Label""><asp:Label ID=""LabelGenericEntity"" runat=""server""></asp:Label>:</td>" + _
             "<td><img src=""Images/point.gif"" width=3 height=1 /></td>" + _
             "<td><asp:DropDownList ID=""NoEntity"" runat=""server"" Width=300></asp:DropDownList>" + _
             "</tr>"
            loControlLabel.Controls.Add(loControlLabel2)

...and, hoping for NoEntity to be seen after with:

loControl = Page.FindControl("NoEntity")