A simple tool I made to help me pick the right window style combination. select the style(s) you want for your new window gui and see them live in the preview window to the right, then copy the resulting text out of the preview window, in to your guicreate line...   #include <EditConstants.au3> #include <StructureConstants.au3> #include <WindowsConstants.au3> #include <GuiTreeView.au3> #include <TreeViewConstants.au3> #includ