The Xceed Component Installer will copy all the necessary files into the product's installation folder (usually in <Installation Folder>\Xceed Components\Bin\.NET) as well as place a copy of the Xceed Docking Windows for WinForms assemblies (Xceed.DockingWindows.v#.#.DLL and Xceed.DockingWindows.Layout.v#.#.DLL) in the global cache. The only things left to do in order to begin using Xceed Docking Windows for WinForms is to reference the assemblies in your project or add the control to your toolbox and make sure the component is properly licensed for runtime use.
To add the control to your toolbox , the following steps must be taken :
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Select the toolbox tab where you would like Xceed Docking Windows for WinForms to be.
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Right click on the toolbox and select the "Choose Items..." option. This should launch the "Choose Toolbox Items" dialog.
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Select the ".NET Framework Components" tab and select the "DockLayoutManager" component. If the component does not appear in the list, reinstall the product.
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Click on the "OK" button.
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Add the control to your form.
To add a reference to the in your project, the following steps must be taken:
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Select the "Add Reference" option from your "Project" menu. This can also be done by right-clicking on the "References" menu in the "Solution Explorer" and selecting the "Add Reference" option.
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In the "Add Reference" dialog, select the ".NET" tab
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Select the (Xceed.DockingWindows) from the list of available components and click on the "Select" button. If the component does not appear in the list, reinstall the product.
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Click on the "OK" button.
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You can then use the Imports statement to create aliases for existing namespaces, and avoid having to type the fully qualified type names.
VB.NET 
Copy CodeImports Xceed.DockingWindows
Imports Xceed.DockingWindows.TabbedMdi