How to match text regardless of case

This seems like there should be an easy answer to this, but I've been searching the net and cannot find a solution.

In SQL 2008 Reporting Services, I have the following expression:

=Iif((Fields!Country.Value = "mycountry" or Fields!Country.Value = "country"), Nothing, Fields!Country.Value)

How do I make this expression case insensitive? I want to match "country", "mycountry", "MyCountry", "COUNTRY", etc. Is there a function such as the following to do this?

=Iif(IgnoreCase(Fields! Country.Value =....

Or is there a regular expression that can be used for the purpose?

Thanks!