I can set the color to the Parent item, but not to the Child item. So I tried using the Help file example to set the color to parent and child items. #include <GUIConstantsEx.au3> #include <GuiImageList.au3> #include <GuiTreeView.au3> #include <WindowsConstants.au3> Example() Func Example() Local $hItem, $hImage, $iImage, $idTreeView Local $iStyle = BitOR($TVS_EDITLABELS, $TVS_HASBUTTONS, $TVS_HASLINES, $TVS_L