GMA 950 OpenGL : cannot enable vertical sync in windowed mode

GMA 950 OpenGL : cannot enable vertical sync in windowed mode

My app uses OpenGL for rendering. For some reason, I can't switch vertical syncronization on when running the app in windowed mode. I can enable vsync in fullscreen mode though.

I use wglSwapIntervalEXT function to control vert syncronization.

Thanks for help.

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