![]() ![]() Classes at the school are categorized into departments. Let's say that you are tracking students and classes for a small college. You'll also take a look at the ListView control, and see an example of responding to an event in the TreeView control to fill the ListView control. In this section, you'll see how to add a TreeView control to a form and how to populate and display the information based on user interaction with it. ![]() For example, in the Northwind database, Customers have Orders, and Orders have line items that are known as Order Details. A hierarchy can involve any data contained within a one-to-one or one-to-many relationship. The TreeView control is used to display data that exists within a hierarchy of information. In many cases, this means you must have a license to distribute a particular control to other computers. They must be installed on each computer to use them. ![]() ActiveX controls are not without cost, however. Adding a control such as TreeView, ListView, or Calendar is a great way to add functionality to your applications with minimal effort on your part. ActiveX controls are additional components that provide their own user interface, properties, and methods. One powerful feature of Access development is the capability to add an ActiveX control to a form or report.
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