CloseFrontEnd[] closes the link to the front end that was opened by UseFrontEnd[] or ConnectToFrontEnd[].
EndModal[] is the head of an expression sent by Java to signal the end of a DoModal[] loop.
GetComplexClass[] returns the Java class used for complex numbers sent from, and returned to, Mathematica.
JavaBlock[expr] causes all new Java objects returned to Mathematica during the evaluation of expr to be released when expr finishes. It is an error to refer to such an object ...
JavaUILink[] returns the MathLink LinkObject used by calls to Mathematica that originate from Java user-interface actions, or Null if no such link is present.
NETBlock[expr] causes all new .NET objects returned to Mathematica during the evaluation of expr to be released when expr finishes.
NETUILink[] returns the MathLink LinkObject used by calls to Mathematica that originate from .NET user-interface actions, or Null if no such link is present.
$TetGenLibrary is the full path to the TetGen library loaded by TetGenLink.
CPointerMember[obj, mem] is a symbolic representation of access from a pointer to a struct.
SetWidgetReference[name, value] registers a widget with string name in the widget registry for the current interface.