> I found this screenshot from Xbase++ newsgroup.
> Is it created with ActiveX or Xbase++?

you have to ask Author what it is ;)
 
i see some underline ... are they true Commandlink ?
it seem me a like a Treeview where you can open Node Familie
 
as i know Xbase++ does not have Ownerdraw for XbpTreeView()
 
have a look at Pablos Websitewww.xbwin.comand search for DXE Lib
it does have native Controls with (almost) same Xbase++ Syntax but have more Property like Owner-/Custom-draw