Based on a tutorial I found online, I did the following to create a new module:

1. Created a new, very simple web user control under "(DNN Root)\DesktopModules\MyModule" folder
2. Wrote the source HTML/ASP.net and the code behind and compiled the page
3. Created a new module definition in DNN website and uploaded the user control
4. Created a new page in the DNN website
5. Dropped this new module on this new page.

The intended functionality is working great within the live website, but I would like to debug the code-behind using standard VS2008 tools.  The way I have traditionally done it is by attaching the debugger to the w3wp.exe process running managed code (after making sure that the VS project/website is running under "debug" confuguration).  

The issue is that this is not working in this case.  The breakpoint in my code-behind never gets hit (displays that typical "symbols have not been loaded" error).  I am guessing that this is because the dynamic page that executes in the site at runtime does not use the web user control at a physical level?  I am new to DNN and do not know how to proceed.  For this simple piece it is fine, but for more complex code, I'd definitely like to be able to step through it.  Any help someone can give me would be greatly appreciated!

Thanks!

Thanks Ian.  I actually did some more research and found exactly what you said.  I have created the WAP module and placed it on a page in DNN, and can debug normally without an issue.  

Now, the issue that I see is that for every single module, I am going to have to have a web application project in my DNN solution.  Our corporate website contains over 100 user controls, which means I am going to have to have over a 100 separate WAP projects in my DNN solution, correct?  Is this normal for a typical association's website?  Also, those user controls contain redirect hyperlinks/buttons etc - how would I set a hyperlink's NavigateURL in a user control when I do not even know the full page URL that's going to be automatically generated for each module?

Thanks!

 Thanks again, Ian.  I will look into the help link you provided, and hopefully post a solution to my own question in a couple of days.