How can I add a context menu extension for the root directory?

Question

To add an option Open with FolderSize to the Explorer context menu I added the following key to the registry:

Windows Registry Editor Version 5.00

[HKEY_CLASSES_ROOT\Directory\shell\Open with FolderSize]

[HKEY_CLASSES_ROOT\Directory\shell\Open with FolderSize\command] @="\"C:\FileUtils\FolderSize\FolderSize.exe\" %1"

This works, but not for the root directory, like C:\. How can I add the option for the root as well?

Answer 1

[HKEY_CLASSES_ROOT\Drive\shell\Open with FolderSize]