XLL+ version 6 now supports .NET integration.
The XLL+ AppWizard has a new option that lets you choose to add Common Language Runtime support to your add-in.
A new set of runtime libraries handles all the intricacies of coordinating the initialization and management of the C++, .NET and Excel add-in environments.
We have added a new set of helper functions, to make it easy to convert data between .NET forms and standard C++ forms.
See the User Guide for more details of the new .NET/CLR support.