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From: gerard_z on 30 Oct 2006 17:43
Hi,

I have a vendor HID device with two additional endpoints, 0x81 (input) and
the optional endpoint 0x02. With only one endpoint (0x81) everything is ok.
I can get a handle with CreateFile and I can send messages with
HidD_SetOutputReport and with WriteFile.

Now I have introduced a second endpoint (0x02 - output). I can still
discover the device and I can get a device handle. I even can send messages
over the control pipe with HidD_SetOutputReport. However if I try to write
via WriteFile then I get an error 1784. I guess that I have to use another
handle which is pointing to the pipe with endpoint 0x02. But how???


Thanks
From: Doron Holan [MS] on 31 Oct 2006 01:52
HIDclass will not expose that endpoint for you to use since ti does not
comply to any HID spec

d

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"gerard_z" <gerard_z(a)discussions.microsoft.com> wrote in message
news:17F4A187-CE22-4C21-A687-FB7899D42218(a)microsoft.com...
> Hi,
>
> I have a vendor HID device with two additional endpoints, 0x81 (input) and
> the optional endpoint 0x02. With only one endpoint (0x81) everything is
> ok.
> I can get a handle with CreateFile and I can send messages with
> HidD_SetOutputReport and with WriteFile.
>
> Now I have introduced a second endpoint (0x02 - output). I can still
> discover the device and I can get a device handle. I even can send
> messages
> over the control pipe with HidD_SetOutputReport. However if I try to write
> via WriteFile then I get an error 1784. I guess that I have to use another
> handle which is pointing to the pipe with endpoint 0x02. But how???
>
>
> Thanks


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