ReadFile doesn't work for me

NTDEV
1

Hi all,

I was trying to use ReadFile from the application to do DIRECT_IO. The
ReadFile failed with an error code 87, INVALID_PARAMETER, I can’t find
anything wrong with the parameters.

Here is my call:
bRead = ReadFile( m_hDrv, t, 1515*sizeof(unsigned char), &cbBytesRet, NULL);

m_hDrv is the HANDLE returned by CreateFile, which is successful. t is an
unsigned char array.

Any comments on what could be wrong?

Thanks!

–z