The action that occurs is equivalent to the mouse click on this item.
The access-key is the feature of a browser, which is triggered by the keyboard entry of Alt+key.
That property is supported only for InternetExplorer, which allows to set focus to the <TD> html element.
If the <u> string is not found in the Text of this item and the value of AccessKey is set as the UPPER-case-letter, then the first found access-character in the Text is rendered with underscore.
Target Platforms: Windows 10, Windows 8.1, Windows 8, Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2