This attribute tells the coloradjust object for which
screen mode the color shall be adjusted. The object
queries the display data base for some mode attributes
(such as supported number of red/green/blue bits) and
adjusts its display accordingly, giving the user an
idea of what colors are supported.
Omitting this attribute does not affect the functionality
of a coloradjust object. The user will still be able to
adjust a color. However, if you know the ModeID, you
should supply it.