A system provides interaction between graphical objects and a managing
application by detecting that movement of a first graphical object
relative to a second graphical object on the graphical user interface is
within a spatial proximity. In response to the detection of movement, the
system notifies the first graphical object of presence information
related to the second graphical object. The presence information includes
at least an identity of the second graphical object. The system forms an
association between the first graphical object and the second graphical
object based on the presence information, and then graphically alters a
representation of at least one of the first graphical object and the
second graphical object on the graphical user interface in response to
the formation of the association with each other.