parent - the parent object; NULL will cause a
default toplevel to be created automatically
name - a name for this particular instance of the object
(for use in app-defaults files, etc)
OUTPUT
none
RETURN VALUE
The connection object on success, NULL on failure.
DESCRIPTION
The connection object provides a mechanism for visually
linking two objects. It is used in cantata to connect
glyph objects together, but can be used to connect
any two objects. A line will be drawn between the two
objects; the line will resize and redraw if either of the
two objects are moved. Several styles of connections
are provided, which can be used to change the appearance of
the connection.