If you do not need to restrict the folder-view to your user, then I would suggest using the FileDialog method (the interface is more intuitive then what invoking the shell gives you). For additional details, you can read more on CPearson's site. He has a lengthy article on browsing for folders using VBA (mulitple ways; the FileDialog option is at the very end):
Function BrowseFolder(Title As String, _
Optional InitialFolder As String = vbNullString, _
Optional InitialView As Office.MsoFileDialogView = _
msoFileDialogViewList) As String
Dim V As Variant
Dim InitFolder As String
With Application.FileDialog(msoFileDialogFolderPicker)
.Title = Title
.InitialView = InitialView
If Len(InitialFolder) > 0 Then
If Dir(InitialFolder, vbDirectory) <> vbNullString Then
InitFolder = InitialFolder
If Right(InitFolder, 1) <> "\" Then
InitFolder = InitFolder & "\"
End If
.InitialFileName = InitFolder
End If
End If
.Show
On Error Resume Next
Err.Clear
V = .SelectedItems(1)
If Err.Number <> 0 Then
V = vbNullString
End If
End With
BrowseFolder = CStr(V)
End Function
This function takes two parameters. The first, Title is a string specifying the title to be displayed with the file dialog. The second InitialFolder, which is optional, specifies the initial folder to which the dialog should open. The third parameter, also optional, InitialView specifies the view type. See MsoFileDialogView in the Object Browser for the valid values of this parameter. The function returns the fully-qualified folder name selected by the user or an empty string if the user cancelled the dialog.