Hi there,

I'm new to DNN, so have some entry level questions. Your help is greatly appreciated.

I'm reading the book "Professional DotNetNuke 4". It has tips like "Don't change the DNN core codes, only extends them" (it's my understanding, may not be accurate).

My questions are: what are the DNN core codes? Are all the codes coming with the Source package considered core except release.config/web.config?

If I want to slightly alter how a user control under the Website/admin folder work, can I just make the changes to the control or should I create a new user control?

Also where are the source code for the Modules? for example, under Website/DesktopModules/Blog/Blog.ascx, it has page derective like  Inherits="DotNetNuke.Modules.Blog.Blog", but where can I find its code behind?

Thank you very much!

in addition, you should modify the namespace using yourcompany instead of dotnetnuke, this prevents from any conflict, if both modules are installed aside of each other.

Thank you very much, Cathal! The concept of the "Core Code" becomes much clearer to me now.

I'm reading the chapters about developing modules in the book now, so I have a good understanding on how to develop a standard module or slightly modify an existing module and rename it or alter the namespace to make it my own.

But about the user controls under Website/Admin/Authentication, they are not regular modules, right? Regular modules are all under Website/DesktopModules. For example, if I want to change the way how the DotNetNuke.Modules.Admin.Authentication.Login control work, which way below is better?

1. make changes to the current Login control and maintain it through upgrades, either by reapply the changes or keep the file unchanged by the upgrades.
2. make a new user control, use the new user control at place where DotNetNuke.Modules.Admin.Authentication.Login is used right now.

Also which dll does the DotNetNuke.Modules.Admin.Authentication.Login build to? I didn't find it in the dlls under \Website\bin.

Thank you very much!