Epson TM-U230 Developer's Manual page 58

Confidential
Printer.font.Name = "ControlA"
Printer.Print "A"
Printer.EndDoc
This specifies the driver to transmit the buzzer control command ESC(A defined by Control-A
font to the printer subsequently to the print data "TM-U230" and "Buzzer Test".
Refer to the TM-U230 series specification for more details of ESC(A command.
Refer to the manuals included in EPSON Advanced Windows Driver for more details of
Control-A function.
Programming Samples 4-10