Here are the classes, structs, unions and interfaces with brief descriptions:

[detail level 12]

ThreeGear
BasicMessage	The most basic form of the hand tracking message includes a type, which hand was updated, and the position and rotational frame of each hand. The hand rotation is specified as a quaternion (x,y,z,w).
BimanualPinchMessage	Messages relating to simultaneous or individual pinching
CalibrationMessage	Message that indicates the progress of calibrating the user's hand scale.
HandState	Structure holding the position, rotational frame and other information relevant to the state of the hand.
HandTrackingMessage	Base class for all hand-tracking messages / events.
OpenCVCamera	A class representing the intrinsic/extrinsic parameters of the depth camera.
PinchMessage	Messages relating to pressing, releasing, dragging and moving of each hand.
PointMessage	Messages related to pointing with the index finger.
PoseMessage	Message that exposes the hand skeleton information for both hands.
UserMessage	Message that exposes the user name and skinning information for the user's calibrated hands.
WelcomeMessage	A message sent upon connecting to the server, indicating the server and protocol version.