This class is now deprecated, and has been replaced by a mixed push/pull model implemented in VBA.
It is included for the benefit of code written with earlier versions (4.2.5 and below) of XLL+.
The CXllMtMsg class is an empty class, designed for use with the multi-threaded add-ins.
Data that is passed between threads in a push application should be contained in CXllMtMsg objects. Each implementation class should define a class descended from CXllMtMsg and enbed all the required data within it.
For more information, see Create a new class descended from CXllMtMsg in the User Guide.