This NULL driver needs to be installed on Windows 10 in order to associate Honeywell Scanner device when configured
as USB HID barcode scanner. The NULL driver tells the OS not to use the new "POS HID Barcode scanner" driver, but rather using the
HID class driver for our scanner.
If you want to revert back to the system POS HID Barcode scanner, just uninstall the NULL driver.

To Install/Uninstall the NULL driver:
1/ nulldrvinstall.bat /install ==> install the NULL driver, and disable EnhancedPowerManagementEnabled
2/ nulldrvinstall.bat /uninstall ==> uninstall the NULL driver

To query the version of this driver package:
1/ nulldrvinstall.bat /version ==> version string will be outputted to standard output

RETURN CODE:
0  -- SUCCESS    - Requested action executes successfully
1  -- FAILURE    - Requested action executes with a failure


NULL Driver Version Notes:
---------------------------

Once installed, the NULL driver version will be store in registry at the below location:
\\HKLM\SYSTEM\CurrentControlSet\services\honeywell_null\Parameters\NullDriverVer, type REG_SZ, with NONE ZERO value

Once uninstalled, the NULL driver version will be set to zero at the below location:
\\HKLM\SYSTEM\CurrentControlSet\services\honeywell_null\Parameters\NullDriverVer, type REG_SZ, with ZERO value


NULL Driver Programming Guides:
---------------------------------

1/ Figure out whether the NULL driver supports version control or not.
nulldrvinstall.bat /version
* if the return code is 1, nothing is outputted to standard output ==> the /version option is not supported, this version of the NULL driver does not support version control
* if the return code is 0, verstion string is outputted ==> this version of the NULL driver does support version control

2/ Figure out the version of the NULL driver
* Query the NULL Driver version, NullDriverVer. An error return indicates target machine either 
a/ and older NULL driver without version control installed, or 
b/ never has any version of NULL driver installed
For all of the above, an unconditional uninstall is recommended.

