Sorry João Paulo Figueira, but my english is poor. The printing problem more difficult for me, i can't explain exactly. The fact of the matter is that need a sample of printing where: sw: evc++ 4.0 hw: dot matrix printer port:COM1..2 :confused: Thank you in anticipation!

use CreateFile() pass "Com1:" as file name. make sure you have com1 available in the system. eric feng www.infospec.com

Do you get a proper value from COLUMN_NAME? Note that DATA_TYPE is a numeric value. Regards, João Paulo Figueira Embedded MVP