IOCTL_GET_USB_DESCRIPTOR IOCTL (usbscan.h)
Returns a specified USB Descriptor.
Major code
Input buffer
Pointer to a USBSCAN_GET_DESCRIPTOR structure.
Input buffer length
Size of the input buffer.
Output buffer
Pointer to a USB_DEVICE_DESCRIPTOR, USB_STRING_DESCRIPTOR, or USB_CONFIGURATION_DESCRIPTOR structure.
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 USBSCAN_GET_DESCRIPTOR structure as the function's lpInBuffer parameter. Depending on the value specified for the DescriptorType member of the USBSCAN_GET_DESCRIPTOR structure, the function's lpOutbuffer parameter must point to either a USB_DEVICE_DESCRIPTOR, USB_STRING_DESCRIPTOR, or USB_CONFIGURATION_DESCRIPTOR structure.
The kernel-mode driver obtains a USB descriptor by calling UsbBuildGetDescriptorRequest.
For more information, see Accessing Kernel-Mode Drivers for Still Image Devices.
For more information about USB descriptors, see the Universal Serial Bus Specification.
Requirements
| Requirement | Value |
|---|---|
| Header | usbscan.h (include Usbscan.h) |