Sets a promise continuation callback function that is called by the context when a task needs to be queued for future execution

STDAPI_(JsErrorCode) JsSetPromiseContinuationCallback( _In_ JsPromiseContinuationCallback promiseContinuationCallback, _In_opt_ void *callbackState); 

• promiseContinuationCallback: The callback function being set.
• callbackState: User provided state that will be passed back to the callback.

The code JsNoError if the operation succeeded, a failure code otherwise.

Requires an active script context.