Called by the framework to report any add-in functions that fail to register during initialization
virtual bool ReportRegistrationFailures( );
Returns true if the XLL can continue loading and false if it should not.
This method is called after the functions contained in a DLL are registered with Excel as add-in functions, and one or more fails to register.
The default implementation of this function shows an error message and allows the user to choose whether to continue.
If the function is overridden then the implementation should return true if the XLL can continue loading and false if it should not.