Accentuate active folder in Explorer/Registry structure(Windows Vista, 7)

              For better orientation in the Explorer or in the registry keys, you would like the currently open elements to appear differently since there is hardly any difference in the icons in the standard setting.
              In the system, there is no direct setting for the used folder. But since Windows differentiates between the states, different icons can at least be assigned for this through the registry.
              Type ‘regedit’ in the search field of the Start menu and press enter. Confirm the query of the user accounts manager with ‘Yes’ or ‘Continue’. Then, navigate to the key ‘HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer’.
              There, search for the sub-key ‘Shell Icons’ or create the same with the command ‘Edit | New | Key’. Now, open this and in there add the value ‘4’ with the command ‘Edit | New | Character string’. That is the internal key for the system icon of an open folder. Double click on this new entry for editing.
               As ‘Value’, you can assign any icon you wish. For example, use ‘shell32.dll,-46’ here. This entry points to a folder symbol within the library with an additional green arrow. You can add an even more conspicuous symbol like ‘shell32.dll,-290’ or any other. But remember to always put a minus sign in front of the index number of the symbol. For searching for an appropriate symbol, you can use a tool like IconsExtract. Confirm the entry with ‘OK’ and close the registry. When you start Windows Explorer or the Registry editor the next time, the change will become effective.