To create you own workspace in an Office application like Outlook you need a CustomTaskPane . To call a CustomTaskPane you need to create at first a UserControl . In that UserControl you can build your own layout. After that you need to create a class called TaskPanes. This class contains two functions, one to create a CustomTaskPane and one to remove it. In the create-function you are creating an object of your UserControl and a CustomTaskPane-object. By creating the CustomTaskPane you are giving the UserControl and a headline over.