An access key, also known as a mnemonic, is an underlined character in the text of a menu, menu item, label of a button, or some other control. For example, a user can display a menu by pressing the ALT key while also pressing the indicated underlined key, such as ALT+F, to open the File menu. To use the access key of a menu item, the menu containing the item must be active. Controls such as toolbar buttons and menu items often have an associated shortcut key. A menu item can have both an access key and a shortcut key associated with it. If the value of the AccessibleObject.KeyboardShortcut property is a single character, you can assume it is an access key.

Namespace: System.Windows.Forms
Assembly: System.Windows.Forms (in System.Windows.Forms.dll)
Assembly Versions: 1.0.5000.0, 2.0.0.0