On 31 Mar, Steve Lhomme wrote : > Doesn't seem to be available on XP > > https://msdn.microsoft.com/en-us/library/windows/desktop/ms688692%28v=vs.85%29.aspx modules/demux/asf/libasf_guid.h -> GUID_FMT With my kindest regards, -- Jean-Baptiste Kempf http://www.jbkempf.com/ - +33 672 704 734 Sent from my Electronic Device