Thanks for the additional information.
The SelectDirectoryDlg object doesn’t actually make calls to BrowseForFolder(). It is an encapsulation of another function native to the language Formativ was developed with.
This means that, at least with the current version, you are unable to access some of the functionality you mention.
We do recognise this as an issue however, and have slated several improvements to this control in SP1, due to be released as a beta in about four weeks time. I can’t specifically state what features will be available, suffice to say that you will have more control over the dialog via applets, including the ability to create a folder.
I hope this helps. Keep an eye on the site for information about SP1.