Does anyone know the registry location for the Folder icons (open/closed) are?

For example, the search icon is located at the reg key {2559a1f0-21d7-11d4-bdaf-00c04f60b9f0}

I remeber a thread listing all the reg key values to there icons, but cant seem to locate it. (the search on this forum is tinny)

Here u go :

Where 3 and 4 represents Closed/Opened Folder, replace MyDLL.dll with your own, or just point to an icon or icon library, like this

Good stuff.