Problem creating NDISUIO handle

Hi
I am having a problem creating a handler for pocket pc. Below is a snippet of the code i am using. It works perfectly in WinXP but not in Windows Mobile5.0(Dell Axim X51V)

I had changed the pinvoke to use coredll.dll for pocket pc.

private const string NDIS_FILE_NAME = @"\\.\\Ndisuio";

DriverHandle = CreateFile(NDIS_FILE_NAME,
GENERIC_READ | GENERIC_WRITE, 0, 0,
OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL,
INVALID_HANDLE_VALUE);

DriverHandle returned is -1 which is INVALID_HANDLE_VALUE.

After the create file i got error code 161 which is "ERROR_BAD_PATHNAME - The specified path is invalid."

Is my path to Ndisuio incorrect Or anyone know what is wrong

Thanks in advance.

Answer this question

Problem creating NDISUIO handle

houtexwebdev
A) In the registry of Axim I do see ndisuio.

B) \\.\\ denotes directory if I am not wrong.
Eugene S.B.
It mention nothing about path in the registry.

Except things like:
Dll ndisuio.dll
Flags 2
Index 1
Order 3
Prefix UIO

This is all the information the registry provided.
Fernando Ronci

There is no path or special filename prefix (\\.\) needed.

You should be able to get the handle using 'UIO1:' as filename.

More see:
http://groups.google.com/group/microsoft.public.windowsce.platbuilder/browse_thread/thread/12e99b712bcc643f/1259aecd214f85d1 lnk=st&q=UIO1%3A+CreateFile&rnum=4#1259aecd214f85d1

Hope this helps
Michael
QWERTYtech
Chun Siong wrote:
A) In the registry of Axim I do see ndisuio.

B) \\.\\ denotes directory if I am not wrong.

A) what does the registry entry say as far as path

B) \\.\\ looks like escaped slash . escaped slash ... which seems to be a reference to root (the first slash) then a reference to self (again, root -- a dot is current directory, two dots is parent directory) and another escaped slash -- meaning, if it's even a valid path for a device, you're looking for nsiduio in the root of the device. you'll want to reference the path found in the registry .. something simialr to \\windows\\nsudio I'd suspect, but I don't have a device with me here at the office to check.
adorer
I tried using UIO1: before.
DriverHandle = CreateFile("UIO1:",
GENERIC_READ | GENERIC_WRITE, 0, 0,
OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL,
INVALID_HANDLE_VALUE);
A valid driver handle is return. Last error is 0 which is normal.

Next I used the handle to invoke DeviceIoControl,

DeviceIoControl(DriverHandle,
IOCTL.IOCTL_NDISUIO_BIND_WAIT,
IntPtr.Zero,
0,
IntPtr.Zero,
0,
out BytesReturned,
Handle.Zero
The error returned is 6 "ERROR_INVALID_HANDLE The handle is invalid."

It make me wonder what i did wrongly.

Note:
    internal enum IOCTL
    {
        IOCTL_NDISUIO_BIND_WAIT = ((0x12) << 16) | ((0x1 | 0x2) << 14) | ((0x204) << 2) | (0),
            IOCTL_NDISUIO_QUERY_BINDING = ((0x12) << 16) | ((0x1 | 0x2) << 14) | ((0x203) << 2) | (0),
                IOCTL_NDISUIO_OPEN_DEVICE = ((0x12) << 16) | ((0x1 | 0x2) << 14) | ((0x200) << 2) | (0),
                    IOCTL_NDISUIO_QUERY_OID_VALUE = ((0x12) << 16) | ((0x1 | 0x2) << 14) | ((0x201) << 2) | (0),
                        IOCTL_NDISUIO_SET_OID_VALUE = ((0x12) << 16) | ((0x1 | 0x2) << 14) | ((0x205) << 2) | (0)
                        }
MikeH2005
a) does ndisuio even exist on devices

b) what's with the \\.\\ notation
Problem creating NDISUIO handle

Answer this question