NDISUIO ReadFile fails with unknown error code

Hello all,


I've got an NDISUIO application running under CE 5.0. I've gotten most
of the preliminaries straightened out, including disabling WZC, so that
I can bind a device to NDISUIO, which I believe is the pre-requisite
for reading and writing. I'm able to get/set OIDs just fine. I've
followed the advice of an earlier poster and setup the
OID_GEN_CURRENT_PACKET_FILTER to (NDIS_PACKET_TYPE_DIRECTED |
NDIS_PACKET_TYPE_BROADCAST). This succeeds. None of the NDISUIO related
calls return an error.


I've spun off a separate thread because I believe ReadFile is a
blocking operation if no data is available. Here is the ReadFile()
invocation...

result = ReadFile(hNdisuio,
(LPVOID)rxBuf,(DWORD)sizeof(rxBuf),(LPDWORD)&bytesRead, NULL);
if (result == (BOOL)0)
error = GetLastError();
else {
// do something useful...


It returns 0 with an error code of 0x48f (1167), which I can't seen to
find in the Microsoft CE 4.2 documentation:

1157 One of the library files needed to run this application cannot be
found. ERROR_DLL_NOT_FOUND
[???]
1200 The specified device name is invalid. ERROR_BAD_DEVICE

Could someone who has gotten ReadFile to work with NDISUIO please give
me a hand with this?

Thanks very much,

Tim Meese