The control or form using this Image object should set this property to it's own accessibility settings before rendering. The control or form remains responsible for setting the AlternateText to a meaningful text equivalent for this image if it is functional or informational for compliance purposes according to paragraph 1194.22(a) of the Section 508 accessibility requirements of the U.S. government. If the image is decorative only, then no AlternateText must be set. By setting this property to true, an empty alt attribute will be rendered by this Image object as required.
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