Structure with name of EP_RECORD

I have been running sketches for using the USB host and I have found a structure which I cannot find in the header files.

The structure is EP_RECORD and it is being called in the sketch for the keyboard. The sketches have been taken from the Oleg from the below mentioned link

http://www.circuitsathome.com/mcu/arduino-usb-host-part-4-peripherals#more-1075

Can anybody tell me where this structure and its function have been defined. Is it a default structure ?

BR,
Vik

Vik009:
I have been running sketches for using the USB host and I have found a structure which I cannot find in the header files.

Start with <usb.h>

Can anybody tell me where this structure and its function have been defined.

It's on your computer somewhere because...

Is it a default structure ?

There is no such thing in C / C++.

According to Glorithm the structure is going bye-bye...