Hi everybody, I'm using _GuiCtrlTreeView_Add and _GuiCtrlTreeView_AddChild to create a treeView with about 42000 items. This takes about 22 seconds. When I use GUICtrlCreateListViewItem it only needs 5 seconds. My understandind is that the Autoit and the UDF way of creating a TreeView can't be mixed. Do you have any tips to improve performance of my script? Thanks in advance Thomas For $i = 1 to $asTree[0] ; Tabelle um jeweils 10000 Eintr├Ąge erweitern If Mod($i,50000)=