RFC Message Creation

Hello All,

I am new to XI and trying out and RFC scenario. I have an SAP R/3 system.

All I wanted to know is how I can create an RFC message with two import parameters and one export paramter. The two import parameters will serve as request parameters and one export parameter in RFC will server as response parameter.

Please guide me how I can create this kind of RFC messages in R/3 system, so that I will import it once I create in R/3 system.

Thanks in advance.