I want to give a constant value in report parameter (such as in report parameter @status=Null ) always any should not visible. But when Set its defalut values "Null" for "All" it works fine.But when I select value from another parameter list, its takes something else than "Null". And data does not displays. So I just want to pass a constant value "Null" always for the specific report. How can I do it in SSRS 2008.Thanks Santosh