Set the context-level source event callback for an LBMContext.

C# |
public void setContextSourceEventCallback( LBMContextSourceEventCallback cb, LBMEventQueue evq )

- cb (LBMContextSourceEventCallback)
- LBMContextSourceEventCallback callback delegate.
- evq (LBMEventQueue)
- LBMEventQueue on which to place context-level source events (can be null).