Add button with function on custome screen in WBS

Hi There,

I have activated enhancement CNEX0007 and created a custom Sub Screen. I want to have Buttons on thsi Sub Screen, which execute specific functions (call Transaction etc.)

It works, but the Problem is that in the PAI module after clicking on the button I dont have Access to any PRPS data.

Any idea how i can get this there, so that the cusome function can work further with the WBS being processed?

Thanks

Ivan