Use this callback to instantiate the ICENode and register your
custom ICENode. Although user data is stored in the ICENode context during the
BeginEvaluate callback, it can also be set during the Init
callback and then accessed later in the Evaluate callback.
| Note |
The user data stored in BeginEvaluate or Init is always
accessible from the Evaluate callback. However, unless the custom node
threading mode is single-threading, the Context::PutUserData
property cannot be used from the Evaluate callback.
|