ECC and WEbi Report

Hi Experts,

Source System is SAP ECC.I m showing the data in Webi report with the help of BW&Bex

Requirement is

1.In SAP ECC i will give the input value and passing the parameter.

2.Once i done with the parameter,it should take to the Webi and it should display the data.

3..in Webi i will not give prompt value and all.In backend (i mean SAP ECC itself ll give the prompt value),but end users ll see only the webi report with data value.

Is it possible??

If so whats the procedure to make it?

Thanks in Advance