http://msdn.microsoft.com/en-us/library/hh552522.aspx
AccessibleObject Class
http://msdn.microsoft.com/en-us/library/system.windows.forms.accessibleobject.aspx
http://msdn.microsoft.com/en-us/library/hh552522.aspx
http://msdn.microsoft.com/en-us/library/system.windows.forms.accessibleobject.aspx