http://blogs.msdn.com/seema/archive/2006/09/18/hw-acceleration-of-layered-windows-for-rtm.aspxTo obtain GPU-accelerated rendering, Windows Presentation Foundation (WPF) normally renders and presents graphical content through the DirectX pipeline – including the composition of the scene geometry and presentation of the results. Since before Windowsen-USCommunityServer 2.1 SP1 (Build: 61025.2)http://blogs.msdn.com/seema/archive/2006/09/18/hw-acceleration-of-layered-windows-for-rtm.aspx#763038Wed, 20 Sep 2006 06:28:22 GMT91d46819-8472-40ad-a661-2c78acb4018c:763038Nick on Windows Presentation Foundation (Avalon)Seema posted the final word on hardware acceleration for WPF layered windows. Long story short, layered...http://blogs.msdn.com/seema/archive/2006/09/18/hw-acceleration-of-layered-windows-for-rtm.aspx#772991Wed, 27 Sep 2006 03:07:37 GMT91d46819-8472-40ad-a661-2c78acb4018c:772991 No HW Acceleration for Layered Windows on XP at laurenlavoie.comPingBack from <a rel="nofollow" target="_new" href="http://laurenlavoie.com/avalon/192">http://laurenlavoie.com/avalon/192</a>http://blogs.msdn.com/seema/archive/2006/09/18/hw-acceleration-of-layered-windows-for-rtm.aspx#874942Thu, 26 Oct 2006 03:48:30 GMT91d46819-8472-40ad-a661-2c78acb4018c:874942avalite<p>Previously, I had posted that Avalon’s layered windows on XP will be rendered via the software pipeline.</p> http://blogs.msdn.com/seema/archive/2006/09/18/hw-acceleration-of-layered-windows-for-rtm.aspx#1242701Sat, 09 Dec 2006 03:26:39 GMT91d46819-8472-40ad-a661-2c78acb4018c:1242701On .net client stuff.. <p>A feature that the WPF team added late to WPF was the ability to allow transparent windows ( property</p> http://blogs.msdn.com/seema/archive/2006/09/18/hw-acceleration-of-layered-windows-for-rtm.aspx#1909551Mon, 19 Mar 2007 01:20:30 GMT91d46819-8472-40ad-a661-2c78acb4018c:1909551DeveloperZen.com - WPF Layered Windows and Windows XP<p>PingBack from <a rel="nofollow" target="_new" href="http://www.ekampf.com/blog/2006/10/01/WPFLayeredWindowsAndWindowsXP.aspx">http://www.ekampf.com/blog/2006/10/01/WPFLayeredWindowsAndWindowsXP.aspx</a></p> http://blogs.msdn.com/seema/archive/2006/09/18/hw-acceleration-of-layered-windows-for-rtm.aspx#3713054Fri, 06 Jul 2007 00:27:40 GMT91d46819-8472-40ad-a661-2c78acb4018c:3713054seemar<p>UPDATE, there is an XP QFE to enable HW acceleration of layered windows:</p> <p><a rel="nofollow" target="_new" href="http://blogs.msdn.com/seema/archive/2007/07/02/hw-acceleration-of-layered-windows-good-news.aspx">http://blogs.msdn.com/seema/archive/2007/07/02/hw-acceleration-of-layered-windows-good-news.aspx</a></p> <p>Enjoy!</p>