To add new Toolbox items
Although you can drag items into your Toolbox, using the Customize Toolbox dialog box allows you to browse the registry and to locate controls and applets.
Items with a check mark are currently in your Toolbox but may not appear on the current tab.
If the item you want does not appear in the list, choose Browse to locate it.
They will appear on the appropriate tab in the Toolbox.
To delete an item from the Toolbox
The item will disappear from the appropriate tab in the Toolbox.