IOCTL_GET_DEVICE_DESCRIPTOR IOCTL (usbscan.h)

Returns vendor and device identifiers.

Major code

IRP_MJ_DEVICE_CONTROL

Input buffer

Pointer to a DEVICE_DESCRIPTOR structure.

Input buffer length

Size of the input buffer.

Output buffer

Pointer to a DEVICE_DESCRIPTOR structure (same as lpInbuffer).

Output buffer length

Size of the output buffer.

Status block

Irp->IoStatus.Status is set to STATUS_SUCCESS if the request is successful. Otherwise, Status to the appropriate error condition as a NTSTATUS code.

Remarks

DeviceIoControl Parameters

When the DeviceloControl function is called with the IOCTL_GET_USB_DESCRIPTOR I/O control code, the caller must specify the address of a DEVICE_DESCRIPTOR structure as the function's lpOutbuffer parameter. The kernel-mode driver fills in the structure.

For more information, see Accessing Kernel-Mode Drivers for Still Image Devices.

Requirements