// usb.h

struct _URB_GET_CURRENT_FRAME_NUMBER {
  struct _URB_HEADER Hdr;
  ULONG              FrameNumber;
};
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Windows Driver Kit DDI reference (ns-usb-_urb_get_current_frame_number)

_URB_GET_CURRENT_FRAME_NUMBER structure

Description

The _URB_GET_CURRENT_FRAME_NUMBER structure is used by USB client drivers to retrieve the current frame number.

Members

`Hdr`

Pointer to a _URB_HEADER structure that specifies the URB header information. Hdr.Function must be URB_FUNCTION_GET_CURRENT_FRAME_NUMBER, and Hdr.Length must be sizeof(_URB_GET_CURRENT_FRAME_NUMBER).

`FrameNumber`

Contains the current 32-bit frame number, on the USB bus, on return from the host controller driver.

_URB_GET_CURRENT_FRAME_NUMBER - NtDoc