This is the base class the DocumentWindowDockedEventArgs and DocumentWindowDockedEventArgs classes.

Autodesk.AutoCAD.ApplicationServices.DocumentWindowFloatedOrDockedEventArgs
    Autodesk.AutoCAD.ApplicationServices.DocumentWindowDockedEventArgs
    Autodesk.AutoCAD.ApplicationServices.DocumentWindowFloatedEventArgs

Public Class DocumentWindowFloatedOrDockedEventArgs
Inherits EventArgs

public class DocumentWindowFloatedOrDockedEventArgs : EventArgs;