y01nk, I assume you are speaking to CoolKiwiBloke.

CoolKiwiBloke, all modules have a list of controls which are part of the module definition (see host -> Module Definitions). These controls are associated with various action types. (Edit, Host, Admin, View, Anonymous). The various action types (for example View is always the control you view when first viewing a module w/ no querystring parameters in the url pertaining to that module) determine what other modules show on the page in addition to permissions.

To explain this using the forum and how it works, the forum has many controls but we will stick to just two for this example. The Forum_Container.ascx is the initial View action type loaded when a page is first called. (Minus querystring params for the ctl). The Forum_Container.ascx contains logic which determines based on what params in the qs which control to load within Forum_Container.ascx. When we first view the forums in this case no params are in the qs and it loads its default control ForumGroup.vb. (Which is not listed in the module controls because it is dynamically loaded by the Forum_Container.ascx which is listed in the module controls - also note that there is no ascx because the UI is actually all built in the class like a server control does) Now, when we are in a situation where we are attempting to respond to a post (or start a new thread) you will notice that there is a ctl param in the url "PostEdit". This ctl param is listed in the module definitions as a action type of Edit. When this ctl is in the url, it will not load any other modules on the current page except the one which is using that ctl.

Hope this is clear enough for all to understand.