Specify a FilterClientScannerDataWatchTableBarCode to trigger a
client application to perform a task when the specified barcode is
scanned.
Specify a FilterClientKeybFCodeDataWatchTableFCode that watches for
total or tender keys so it can take filter control of the printer
near end of transaction. The client application can passively
monitor device data during the transaction for specific
items/conditions, then at the end of transaction print additional
data to the receipt.
Use FilterClientKeybDataWatchTableKeySwitchNumber and
FilterClientKeybDataWatchTableKeyShiftState to watch for a specific
keystroke (with no function code assigned) and notify the manager’s
office to take control of the keyboard.