OlDefaultFolders constants and their values:

olFolderCalendar 9
olFolderConflicts 19
olFolderContacts 10
olFolderDeletedItems 3
olFolderDrafts 16
olFolderInbox 6
olFolderJournal 11
olFolderJunk 23
olFolderNotes 12
olFolderOutbox 4
olFolderSentMail 5
olFolderTasks 13
olPublicFoldersAllPublicFolders 18