>>For nondefault folder, you can use the Folders collection.

loInbox=loNS.GetDefaultFolder(ccOlFolderInbox)
>>oMFfolder = loInbox.Folders("Michel Fournier")

>
>This is good if the folder I created is under Inbox. But, those I created are under the root.

Try

oMFfolder = loNS.Folders("Michel Fournier")