Apparently Microsoft has (sort of) replaced the \"Favorites\" Windows explorer item with the Quick Access item. But I haven\'t been able to find a way to programmatically ad
Maybe it will help someone until MS releases an API. I ran procmon and it seems that these registry keys are involved
Pin to Quick access:
HKEY_CLASSES_ROOT\Folder\shell\pintohome
When unpin:
HKEY_CLASSES_ROOT\PinnedFrequentPlace\shell\unpinfromhome\command
Also this resource is used when pinning: (EDIT1: can't find it any longer..)
AppData\Roaming\Microsoft\Windows\Recent\AutomaticDestinations\{SOME_SORT_OF_GUID}.automaticDestinations-ms
You can try opening it with 7-zip, there are several files in there which fit the destination
EDIT2: I found running this in the 'Run' opens up Quick access:
shell:::{679F85CB-0220-4080-B29B-5540CC05AAB6}