Call to external subroutines

Hi,

I have a requirement where I have to code dynamic actions in my RFC. My functional person gave me logic where I have to call routines from diff. std programs.I can call the routines but I am not able to pass the parameters in the call as there are no using/ changing parameters defined in called program. During manual action at PA30 fields are auto populated but I am not able to pass them during call to routines.

It will be great if somebody can help me with the solution for this.Thanks in advance.