Introduced in build 9.1
DescriptionThe RegisterCustomFunction method registers an IFunction object with the workbook to be used when calculating a specific custom Excel formula.
customFunctionNameThe name of the Excel Function you want to bind your custom IFunction logic to.
customFunctionThe custom logic you want to use for a specific Excel formula. You implement this logic by using the IFunction interface
SAExceptionIf the custom function has already been registered with the workbook.