Web App Designer: Handing over variables

Hi,

Lets say I have two reports, 1. "Sales last 5 years" and 2. "Sales this year per month". Both only require the customer number from 0CUSTOMER. The end user wants a link in the 1st report to invoke the 2nd report for the same customer. Without entering the customer number again.

How can i realize that with the WAD? I already tried the "VARIABLE_SCREEN="-command, but i didn´t worked properly.

Can someone give my a hint? Thanks!

Regards,

Sebastian