ssrs 2008 r2 iif statement used to make column invisible

In an ssrs 2008 r2 report, I want a certain column not to be visible under certain conditions.

If I would try to write that code in sql, the code looks like the following:

(ISNULL(left(dbo.Customer.num,1),'') In ('0','1') and ISNULL(dbo.Customer.num,'') NOT IN ('0XY','111','133','187'))

Can you tell when how to write the above statement in an iif statement in ssrs to make the column be invisible?