WS_EX_COMPOSITED

Question

Hello! I developed an application using C# and Colin Fahey OpenGL Wrapper. This application was designed to work only on Windows XP and somebody suggested me to use WS_EX_COMPOSITED Windows style. Everything seems to run perfectly but on some computers (with XP) the applications seems to crash and the video go black, and you need to reboot. Simply removing WS_EX_COMPOSITED my program runs normally. I could simply release my program without it, but I'd like to know the reasons for this strange behaviour. Can anyone help me? Thanks