USB2CAN Korlan on Windows

I am trying to use an 8devices Korlan usb2can adapter in Windows 10 64bit. The adapter is using the WinUSB driver and sucessfully captures CAN traffic inside wireshark, so I assume it to be functional.

Then I made a simple test in Python 3.8, to open the bus as instance of Usb2canBus. Initially this did not work because find_serial_devices() inside serial_selector.py tries to match with the legacy usb2can devices that had a serial number starting with "ED".
I modified the code as such:

```
def find_serial_devices(serial_matcher="ED"):
"""
...
"""
objWMIService = win32com.client.Dispatch("WbemScripting.SWbemLocator")
objSWbemServices = objWMIService.ConnectServer(".", "root\cimv2")
items = objSWbemServices.ExecQuery("SELECT * FROM Win32_USBControllerDevice")
ids1 = (item.Dependent for item in items if "VID_0483&PID_1234" in item.Dependent)
ids = (d.strip('"')[-8:] for d in ids1)
return [id for id in ids]
```

Now the call to CanalOpen returned 0 until I swapped .dll's from the 8devices website. The tools/doc page at the 8devices wiki is a bit of a mess and very confusing. Some files are for the older usb2can. Eventually a non-zero Canal dll handle was returned with the dll from https://www.8devices.com/media/products/usb2can_korlan/downloads/usb2can_winusb.zip

However, now the code is running without errors, but I do not see any traffic on the bus while sending.
When I put the device in loopback mode and send, python-can receives a message with length of 0.

```
import os
import ctypes
from can.message import Message
import time

if __name__ == '__main__':
check = ctypes.WinDLL(r'./usb2can.dll')
from can.interfaces.usb2can.usb2canInterface import Usb2canBus

bus = Usb2canBus(bitrate=500000, flags=0x00000001)#Loopback
# bus = Usb2canBus(bitrate=500000, flags=0x00000008)

data = bytearray([1,2,3,4,5,6,7,8])
msg = Message(arbitration_id=1872, is_extended_id=False, data=data, extended_id=False)

while True:
bus.send(msg)
print(msg)
rcv_msg = bus.recv(timeout=1000)
if rcv_msg is not None:
print(rcv_msg)
time.sleep(1)
```
Output of this code is:
```
Timestamp: 0.000000 ID: 0750 S DLC: 8 01 02 03 04 05 06 07 08
Timestamp: 0.000000 ID: 0000 S DLC: 0
Timestamp: 0.000000 ID: 0750 S DLC: 8 01 02 03 04 05 06 07 08
Timestamp: 0.000000 ID: 0000 S DLC: 0
```

At this point I'm out of ideas on how to get the Korlan usb2can to work on Windows, but I'm willing to try any suggestions :)