Accessibility aspects of Close buttons on dialogs?

["Thomas Ward" <tward bright net>]

Hi,being a blind computer user myself I know that having a close gtk+ button
is extremely useful. You have to remember the blind like to be able to arrow
or tab to a control rather than emulating a mouse and moving to a close icon
near the top of the window.
So the programmers should really strongly think about putting a close button
at the bottum of a dialog box.