I\'m writing an application using WPF, and I need to make something that looks like the Visual Studio toolbox (please see pic). What control should I use for this?
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Use an expander control for the expandable headers.
The content of every expander can be a ListBox with a special ItemTemplate (with image an text).
http://wpf.codeplex.com/ has additional controls to help you.
greetz, knom.