I have been looking at the iOptions parameter, and this is the list I get

[vba]

Const BIF_RETURNONLYFSDIRS = &H1 'Only return file system directories.
Const BIF_DONTGOBELOWDOMAIN = &H2 'Do not include network folders below
'the domain level n the dialog box's
'tree view control.
Const BIF_STATUSTEXT = &H4 'Include a status area in the dialog box.
Const BIF_RETURNFSANCESTORS = &H8 'Only return file system ancestors.
'An ancestor is a subfolder that is
'beneath the root folder in the namespace hierarchy.
Const BIF_EDITBOX = &H10 '(SHELL32.DLL Version 4.71). Include an
'edit control in the browse dialog box
'that allows the user to type the name of an item.
Const BIF_VALIDATE = &H20 '(SHELL32.DLL Version 4.71). If the user
'types an invalid name into the edit box,
'the browse dialog will call the application's
'BrowseCallbackProc with the BFFM_VALIDATEFAILED message.
Const BIF_USENEWUI = &H40 '(SHELL32.DLL Version 5.0).
'Use the new user interface, including an edit box.
Const BIF_NEWDIALOGSTYLE = &H50 '(SHELL32.DLL Version 5.0).
'Use the new user interface.
Const BIF_BROWSEINCLUDEURLS = &H80 '(SHELL32.DLL Version 5.0).
'The browse dialog box can display URLs.
'The BIF_USENEWUI and BIF_BROWSEINCLUDEFILES flags must also be set.
Const BIF_BROWSEFORCOMPUTER = &H1000 'Only return computers.
Const BIF_BROWSEFORPRINTER = &H2000 'Only return network printers.
Const BIF_BROWSEINCLUDEFILES = &H4000 '(SHELL32.DLL Version 4.71).
'The browse dialog will display files as well as folders.
Const BIF_SHAREABLE = &H8000 '(SHELL32.DLL Version 5.0).
'The browse dialog box can display shareable
'resources on remote systems.
'The BIF_USENEWUI flag must also be set.
[/vba]

doesn't look like there is an option.