HiHo Community, I was looking for such a function for a long time, didn't know where to start myself. Now the day before yesterday Rasim posted an excellent piece of code called ShellTreeView and I remembered having seen the TristateTreeView function from Holger some time ago... and decided to merge those two ... Rasims ShellTreeView #576433 Holgers TristateTreeView http://www.autoitscript.com/forum/index.php?showtopic=28464 ShellTristateTreeView Thanks and Kudos again to Rasim and Ho