>>
>>Nope. If you do "x=null", x is not a string, is null (no datatype).
>
>Are you sure? Try

x = ""
>? TYPE("x")  && "C"
>x = Null
>? TYPE("x")  && "C"
>

Touché. 8-)

VFP keeps track of the original datatype. This is confusing, but I think they used the same approach as when checking for a field datatype, which of course still has a type when is null.

Thanks for pointing that, Sergey.