Hi Marcus.

>The treeview is not able to instantiate with a error message OLE ERROR 0x80040112 no valid licence for this class can be found (translated from german :-))

Add one of the following keys to the Registry; the first is for version 5 of the TreeView and the second is for version 6:

[HKEY_CLASSES_ROOT\Licenses\DB4C0D00-400B-101B-A3C9-08002B2F49FB]
@="mgkgtgnnmnmninigthkgogggvmkhinjggnvm"

[HKEY_CLASSES_ROOT\Licenses\C74190B6-8589-11D1-B16A-00C0F0283628]
@="knlggnmntgggrninthpgmnngrhqhnnjnslsh"

Doug