Opposite Value of What CBool(Variable) evaluates to

How do i programmtically, in one line get the opposite value of what cbool is evaluating to.  So if Cbool(Var) = True, how would I write the code so that the value would be false.

An example of what i'm doing might help:
Application("VendorVisible") = True

ddlVendorID.visible = Cbool(Application("VendorVisible") )
ddlSalesSiteID.visible = -CBool(Application("VendorVisible"))

In this example if Application("VendorVisible") = true then the dropdownlist VendorID should be visible but the dropdownlist SalesSiteID should not.  I want to avoid an if/then statement.