Return a pointer to the queued function manager.
CXlAsyncManager* GetXlAsyncManager( bool bCreateIfNull = true );
If the singleton instance of CXlAsyncManager has not yet been created, then it will be created on demand if bCreateIfNull is true. If bCreateIfNull is false, and the instance has not yet been created, then it will not be created at this time, and NULL will be returned.
A pointer to the singleton instance of CXlAsyncManager, or NULL if the instance has not yet been created and bCreateIfNull is false.