Custom Aggregate Functions will be available in any formula editor in which the existing built-in aggregate functions are also available.
Custom Filter Functions provide the ability to make functions that will dynamically calculate a value for a filter using high level code.
Administrators may create additional custom functions using high level coding languages which will be accessible to end-users of the Report Designer.
Custom Options allow for the definition of settings that users can modify on a per-report basis in the Report Designer. Options can be accessed during report execution by Server Events or Custom Functions.