VerifyContainerfield - any text, number, date, time, timestamp, or container field; or any text expression or numeric expression.FileMaker Pro 12.0Returns a Boolean value representing the validity of data stored externally in a container field. A 0 (False) value means the data was changed or deleted; otherwise, 1 (True) is returned.VerifyContainer(Photo) returns:
• 0 (False) if files saved externally were modified or deleted.
• 1 (True) if no changes or deletions occurred.
• ? if the Photo field is not a container field.