Including alpha characters in code39 (or any format for that matter)

I am trying to print a barcode where the codetext = "AF12345"
obviously the UPC symbology does not include letters, so i don’t expect that to work. However, when is set the symbology to 3 of 9 the barcode generates shows 12345 when scanned. the alpha characters are not included. if i use codabar as the symbology i get A12345A when scanned. How can I tell the system to correctly include the alpha characters and/or what symbology should i use. this is the .net version btw.

tia
don

withdrawn … the code 3of9 barcodes do indeed print alpha characters correctly. unbeknownst to me, the barcode text in our program was being sanitized of all alpha characters before setting codeText. sorry, completely my fault.
-don