An MKD and a BTR file have the same format. There is no conversion needed. Pervasive/Btrieve does not require a specific file extension.
If you really need the file to be .BTR, look at the "USING" clause on the CREATE TABLE statement.
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.