$ParentLink

$ParentLink is the MathLink LinkObject currently used for input and output by the Mathematica kernel in a particular session.

When the Mathematica kernel is started by a Mathematica front end, $ParentLink gives the MathLink connection between the front end and the kernel.

You can reset $ParentLink in the middle of a Mathematica session to connect the kernel to a different front end.

See Section 2.13.8.

See also: $CurrentLink, Links, $Input.

New in Version 3.