http://bugs.winehq.org/show_bug.cgi?id=22362
--- Comment #1 from Henri Verbeet hverbeet@gmail.com 2010-04-15 10:19:57 --- That's probably because the GLX_SGI_video_sync extension we use in IWineD3DSwapChainImpl_Present() for vsync is never going to be present on wgl. We should probably be using WGL_EXT_swap_control anyway.