Tools

Tools are usually docked to the sides of the window, although they can also be dragged free to become floating windows. Most of the modules (ErrorList, Output, Toolbox, etc.) primarily provide tools. For example, here is the property grid tool class:

[Export(typeof(IPropertyGrid))]
public class PropertyGridViewModel : Tool, IPropertyGrid
{
	public PropertyGridViewModel()
	{
		DisplayName = "Properties";
	}

	public override PaneLocation PreferredLocation
	{
		get { return PaneLocation.Right; }
	}

	private object _selectedObject;
	public object SelectedObject
	{
		get { return _selectedObject; }
		set
		{
			_selectedObject = value;
			NotifyOfPropertyChange(() => SelectedObject);
		}
	}
}

For more details on creating documents and tools, look at the demo program and the source code for the built-in modules.