http://blogs.msdn.com/b/wpfsdk/archive/2007/04/03/centering-wpf-windows-with-wpf-and-non-wpf-owner-windows.aspxThis post demonstrates how to manually center a window with respect to both a WPF and non-WPF owner window. Centering a Window with a WPF Owner Window To center a window over another window in WPF, you need to do two things. First, you need to seten-USTelligent Evolution Platform Developer Build (Build: 5.6.50428.7875)http://blogs.msdn.com/b/wpfsdk/archive/2007/04/03/centering-wpf-windows-with-wpf-and-non-wpf-owner-windows.aspx#10178093Thu, 23 Jun 2011 08:38:38 GMT91d46819-8472-40ad-a661-2c78acb4018c:10178093oddsignals<p>I don&#39;t know when this changed, but at least in .NET 4.0 WPF will honor the WindowStartupLocation=&quot;CenterOwner&quot; setting even with a non-WPF owner window.</p> <div style="clear:both;"></div><img src="http://blogs.msdn.com/aggbug.aspx?PostID=10178093" width="1" height="1">http://blogs.msdn.com/b/wpfsdk/archive/2007/04/03/centering-wpf-windows-with-wpf-and-non-wpf-owner-windows.aspx#2637480Tue, 15 May 2007 04:20:48 GMT91d46819-8472-40ad-a661-2c78acb4018c:2637480Yiling Lai<p>在前一个Post当中，指出了在WPF的WindowInteropHelper类中的一个BUG：通过WindowInteropHelper的Owner属性不能实现把WPF窗口的Owner属性设置为一个非WPF窗口的句柄。在我的Post帖出后不到一天，在WPF SDK的Blog上，就针对这个BUG给出了一个非常完美的解决方案。既然不同通过设置WindowStartupLocation.CenterOwner来改变窗口的位置。那么我们就用WindowStartupLocation.Manual来手动计算设置窗口的位置</p> <img src="http://blogs.msdn.com/aggbug.aspx?PostID=2637480" width="1" height="1">