The framework calls this member function from Print Manager whenever a job is added to or removed from the Print Manager queue.
This call is for informational purposes only.
This member function is called by the framework to allow your application to handle a Windows message. The parameters passed to your function reflect the parameters received by the framework when the message was received. If you call the base-class implementation of this function, that implementation will use the parameters originally passed with the message and not the parameters you supply to the function.