I made this function 4 years ago: I know, it could be done better now. BTW: Open Watcom C - C++ Compiler has a nice Spy onboard showing all sytles and more. And it's is freeware. #include <Constants.au3> #include <WindowsConstants.au3> Global $sActiveWindow = WinGetTitle("") Global $aStyle = _WinGetStyle(WinGetHandle($sActiveWindow)) MsgBox(0, $sActiveWindow & " - Styles", _WinStyle2Text($aStyle[0])) MsgBox(0, $sActiveWindow & " - ExStyles", _WinExStyle2Text($aStyle[1])