Return code from ABAP program in process chain?

Hi,

I have situation where I want to run some little part of my process chain only on mondays. So I am thinking of writing a little bit of ABAP that checks if is monday today. If it is, then return true, and if not return false. Then I want to branch on the outcome of my ABAP process...

...but how do I return that value?

...and what about the overall status if I use this trick to branch off?

I have looked at:

How to… Integrate an ABAP program in a process chain.pdf

How to… Implement custom-defined process type.pdf,

but those documents have not lead me to a solution yet...

Best regards,

Christian Frier