Formatting Controls in ASP.NET

I feel as though this this is a simple question, but can't find an answer anywhere. We've got an interface we're trying to move to an ASP.NET control. It currently looks like:

<link rel=""stylesheet"" type=""text/css"" href=""/Layout/CaptchaLayout.css"" />
<script type=""text/javascript"" src=""../.开发者_如何学编程./Scripts/vcaptcha_control.js""></script>

<div id="captcha_background">
            <div id="captcha_loading_area">
                <img id="captcha" src="#" alt="" />
            </div>

            <div id="vcaptcha_entry_container">
                <input id="captcha_answer" type="text"/>
                <input id="captcha_challenge" type="hidden"/>
                <input id="captcha_publickey" type="hidden"/>
                <input id="captcha_host" type="hidden"/>
            </div>

            <div id="captcha_logo_container"></div>
        </div>

However all the examples I see of ASP.NET controls that allow for basical functionality - i.e.

public class MyControl : Panel
{
public MyControl()
{
}

protected override void OnInit(EventArgs e)
{
ScriptManager.RegisterScript( ... Google script, CSS, etc. ... );


TextBox txt = new TextBox();
txt.ID = "text1";
this.Controls.Add(txt);

CustomValidator vld = new CustomValidator();
vld.ControlToValidate = "text1";
vld.ID = "validator1";
this.Controls.Add(vld);
}
}

Don't allow for the detailed layout that we need. Any suggestions on how I can combine layout and functionality and still have a single ASP control we can drop in to pages? The ultimate goal is for users of the control to just drop in:

<captcha:CaptchaControl ID="CaptchaControl1" 
runat="server"
Server="http://localhost:51947/"
/>

and see the working control.

Sorry for the basic nature of this one, any help is greatly appreciated.

Although you may want to look into user controls, the following page has an example of doing this using a web control. http://msdn.microsoft.com/en-us/library/3257x3ea.aspx The Render() method does the output of the actual HTML for the control.

There are a couple of ways to do it. You can make a custom control, or a user control. I think you will find it easier to do a user control. It lets you lay out parts of your control as you would a regular page. Here is some example documentation: http://msdn.microsoft.com/en-us/library/26db8ysc(VS.85).aspx

By contrast a custom control typically does all of the rendering in code (as your example you show). It is harder to make your first control in this way.