I’m confused on Cell.SetAddInFormula and CellsHelper.AddAddInFunction. From my understanding of Aspose.Cells from forum posts and discussion with a support tech this morning, Aspose.Cells does not support calculating *.xls files/formulas that depend on .xll/.xla. That is understandable. If that is a correct statement, what is the purpose of Cell.SetAddInFormula and CellsHelper.AddAddInFunction functions?
(Note: I understand that if my assumption about xll/xla execution is correct, I am to use ICustomFunction interface to implement my own replacement code)