When WriteFile function (a function of krrnel.dll) is called,
it also returns error.
I got all true for usbconnection and CreatFile.
The deive is Atmel at91sam3u4e. I think the device should return some ack to the host PC.
Please help me to solve this problem. Thank you very much.

I am playing around with this lib and trying to hack the Dream Cheeky USB Panik Button. I can read the data and detect if the button is pushed or not.

My problem now is: currently, I also have to run the original driver, as it seems to poll the button for its state … and I would like to do this myself.

I have found out, that I would have to send
Set report 00 00 00 00 00 00 00 02
to it, in order to get the button state (doing so with e.g. SimpleHIDWrite.exe works fine).

If I now want to use your write-method, it seems to fail.
I get an “The supplied user buffer is not valid for the requested operation” error (implemented the windows error tracking:
[DllImport( "kernel32.dll", CharSet=CharSet.Auto )]
public static extern int GetLastError();
)

Here is my piece of write code:

Byte[] writeBytes = new Byte[8];

writeBytes[0] = 0×00;
//writeBytes[0] = 0×00;
//writeBytes[1] = 0×00;
//writeBytes[2] = 0×00;
//writeBytes[3] = 0×00;
//writeBytes[4] = 0×00;
//writeBytes[5] = 0×00;
//writeBytes[6] = 0×00;
writeBytes[7] = 0×02;
//writeBytes[0] = 2;

bool ok = usb.write( writeBytes );

ok is always false.
Do you have any ideas?

Thanks!