You use the NOT NULL key word to determine whether the table allows null. If you're talking about how to set the null byte when inserting data, you don't. It's set by the engine when a record is inserted through SQL.
Certified Pervasive Developer
Certified Pervasive Technician
Custom Btrieve/VB development http://www.mirtheil.com
I do not answer questions by email. Please post on the forum.