title: winusb_initialize returns false
body: <p>I use ZTE USB Modem device. My device installed to Ports class (driver is usbser.sys).
  I followed msdn example "How to Access a USB Device by Using WinUSB Functions".
  Everything is fine until I call the function winusb_initialize.It returns false with getlasterror 87 i-e ERROR_INVALID PARAMETER.I found a solution on "<a href="http://www.microchip.com/forums/m653017-print.aspx" rel="nofollow">http://www.microchip.com/forums/m653017-print.aspx</a>" but it doesn't help.when i try to change the winusb.inf file in x86 folder,computer says access is denied even though I have logged in as administrator.
  Kindly help me.</p>
  
  <p>Thanks in advance</p>