A "Wraparound" IUnknown so the 3 members got visible.

[nebeln]

Since IUnknown Interface (which is the stemfather of most of all the Interfaces in the Shell32 Interfaces I see it abit awkward why just this interface shall be "hidden" within the OleExp TypeLib (It was never hidden within the EnumDeskVB TypeLib from 1998).
Here is a little walkaround to make these 3 members availabale/Visible.

Public Function GetIUnknown() As oleexp.IUnknown
  Dim pISF As IShellFolder
  Dim ppISF As Long
  Dim pIUnk As oleexp.IUnknown
  
  SHGetDesktopFolder ppISF
  
  MoveMemory pISF, ppISF, 4
  
  Set pIUnk = pISF
  
  Set GetIUnknown = pIUnk
  
End Function

You can also add a pidl, path or an object to Create a IShellItem and get the IUnknown from there.