Question about Follow-Up Actions

Dear all,

When i define the Follow-Up Actions in QM when the usage decision was made, i met a problem. I want to develop a new function when the usage decision was done.But i don't know how to define the import parameter in the function.Because i don't know SAP standard program how to call the function.

Another questions, i just curious that because the new function is define by ourself, when the SAP standard program call the function, how can the sap program know how many parameters value need to be exported? Is it means that we should do something in the SAP standard program?

Thanks for your reply.

Best regards,