Hello, Please look at the image below: (Click for animation) Notice that the "Red" section appearing instantly before the Main GUI... Code: #include-once ; -- Created with ISN Form Studio 2 for ISN AutoIt Studio -- ; #include <GUIConstantsEx.au3> #include <WindowsConstants.au3> #Include <GuiButton.au3> Global $test_gui = GUICreate("test",300,300,-1,-1,-1,-1) GUISetBkColor(0xFFFFFF,$test_gui) GUISetState(@SW_SHOW, $test_gui) Global $test_child_gui = GUICreate("test ch