TransAct Technologies ITHERM 280 - Manual (Page 53)

Setup Procedures iTherm ® 280 Programmer’s Guide
28-07764 Rev C Page 51
POSPrinter ActiveX Control (POSPrinter OCX)
This is not a driver; but rather a software component that provides a connection from an
application to a port driver. This allows an application to communicate “directly” with a
printer. This approach allows an application to send commands to the printer if desired,
similar to the legacy DOS approach once used to communicate with a POS printer.
Figure 9 POSPrinter OCX
When to use the POSPrinter OCX:
When the application writer wants complete control of what is sent to the printer. The
application must take the responsibility of sending the correct codes to the printer as well
as detecting error conditions, and graceful recovery from error situations.
When not to use the POSPrinter OCX:
When you do not want to deal with the low-level commands sent to the printer.
PC Hardware
Window’s Operating System
POS Application
POSPrinter.ocx
ActiveX Control
Port
Driver
Serial
OR
Parallel
OR
U
S B
OR
Eternet
OR
Other
Port
Hardware
Serial
OR
Parallel
OR
USB bus
.
OR
Ethernet
OR
Other
Printer
Driver