详细说明：This sample shows how to programmatically change the Stretch and StretchDirection of content within a Viewbox.

 [DirectShow.rar] - VC6.0平台下direct show抓频代码
 [TreeViewSelectedValue.rar] - This sample shows how a TreeView uses the value of the SelectedValuePath property to provide a SelectedValue for the SelectedItem.
 

文件列表(点击判断是否您需要的文件):
  viewboxStretchLayoutSamp
  ........................\csharp
  ........................\......\app.xaml
  ........................\......\app.xaml.cs
  
  ........................\......\viewbox_stretch_layout_samp.csproj
  ........................\......\window1.xaml
  ........................\......\window1.xaml.cs
  ........................\readme.htm
  ........................\visualbasic
  
  ........................\...........\app.xaml
  
  ........................\...........\viewbox_stretch_layout_samp.vbproj
  ........................\...........\window1.xaml
  ........................\...........\window1.xaml.vb