Actually, I do not work with WinXP but by chance I discovered an effect. This is experimentell only and not fully implemented! Aero must be disabled (will done by script) on Vista+ os! #include <gdiplus.au3> #include <guiconstantsex.au3> #include <windowsconstants.au3> Opt("MustDeclareVars", 1) Opt("GUIOnEventMode", 1) Global Const $hDwmApiDll = DllOpen("dwmapi.dll") Global $sChkAero = DllStructCreate("int;") DllCall($hDwmApiDll, "int", "DwmIsCompositionEnabled", "ptr", D