General Tab, Toolbox
The General tab of the Toolbox is always available. You can use this tab to store controls dragged from your projects for future use, including custom controls. To access the Toolbox, choose Toolbox from the View menu.
Initially, the General tab of the Toolbox is empty. You can add, remove, rename, and organize items on this tab, including custom items. These items can then be dragged from the General tab and dropped into the code editor or onto the active design surface. For more information, see How to: Manage the Toolbox Window and How to: Manipulate Toolbox Tabs.