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First regarding the implicit styling:
In order to merge the Telerik XAML files with code, you should use the following approach:
Source = new Uri("/Telerik.Windows.Themes." + themeName + ";component/Themes/System.Windows.xaml",
In this way the styles will be available for the whole application, not only for the current window. Y
I have attached a simple project to demonstrate how you could style RadDocking control with implicit styles. Note that in this case you should use NoXaml assemblies.
As to the Telerik.Windows.Documents.xaml file - it seems that there is some misunderstanding here, please check again the Applying theme globally in your application
section in the article:
As a general rule of thumb you should merge the xaml files for each assembly reference you have in your project.
Тhis applies also in the reverse direction - you should add a reference to Telerik.Windows.Documents.dll in order to merge this XAML file.
Regarding the last question - we provide Styles for standard MS controls, but you need to manually set them as shown in the code snippet in this article
Hope this clears things up.
the Telerik team