>Hi all:
>I have a program that searches for a [CODENUMBER] and then checks the value of the [BARCODE] field. I want some action taken if the field is .NULL. I know the field is .NULL. because that is how it shows in the field and i can see that value in a debug window. However, the line
>If BARCODE = .NULL.
>doesn't evaluate as true. Why?
>
>Also, this two empty strings:
>" " and "" aren't the same? Why?
>
>Thank you in advance.
>
>Ulises

---

You cannot compare Null values because they are equal to the absence of any value.

ISNULL function will return .T. if argument value is null.

If ISNULL(BARCODE)

For details see topic 'Handling Null Values' in Foxpro Help.