Thank you. I have further question. Does cyAPI.lib contains implementation or it links to other file containing implementation in running phase? Does the driver mean the inf file? I guess the driver contains implementation.
The CyAPI.LIB interacts with the CYUSB3.SYS driver to perform data transfers with the device. The CYUSB3.SYS is the driver file that contains the implementation.
Thank you the question is solved.