File associations with the WindowsAPICodePack

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C#

Windows

Win7

shell

Hi all,

I'm playing about with the WindowsAPICodePack and i've got a few queries regarding how Windows deals with file types.

As part of the API you have the ability to register filetype associations with your application using

RegisterFileAssociations(string progId,
            bool registerInHKCU, string appId, string openWith,
            params string[] extensions)

Simple enough to follow and once done you can have windows keep track of your recently opened files.

But what about folders? How does Windows deal with them? Is there a file extension for folders that is associated with Explorer. Is it possible to associate your program with folders?

I know that's quite a bit of info to request but I've spent quite a while trying to filter through a lot of guff on Google trying to patch together a greater understanding.

I don't normally do any winforms or shell programming (web developer)
so this is all new to me. I'm just trying to piece together a program for an article.

Many thanks in advance for your patience and advice.


Update**********************
Basically I would lke to mimic the behaviour of Windows Explorers recent folders jumplist but I can't find any methods in the documentation that allow this.

My application processes batches of files so it would be nice to add the ability to reopen folders using a jumplist.