Thank you for your answer! I have the following additional questions/items to mention:
1. Can you show me the code of how you would use parenthesis or nest the iif statements?
2. Do you think if I tried one of the following statements the code would work:
either
"=IIF(Globals!RenderFormat.Name = "RPL", true, false)"
or
"=IFF(Globals!RenderFormat.IsInteractive, False, True)",
3. I am using bids 2008 (visual studio 2008) and the report runs on SSRS 2008 2012. Would that make a difference? If so, what difference would it make?