CODEWITHSUNDEEP
visual-c++winusb
madeeha naiyar
madeeha naiyar

Reputation: 1

winusb_initialize returns false

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 "http://www.microchip.com/forums/m653017-print.aspx" 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.

Thanks in advance

Upvotes: 0

Views: 3140

Answers (1)

Math
Math

Reputation: 3396

I you say your handle is good all you need to do is:

   BOOL bResult;
   WINUSB_INTERFACE_HANDLE usbHandle;
   bResult = WinUsb_Initialize(deviceHandle, &usbHandle);

If bResult is true, it means you initialized the WinUsb correctly.

Upvotes: -2

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