How to write a simple usb driver for a hardware copyright protection dongle?

Question

I want to create a USB driver, so my own C application to be able to get into my flash drive and take information from the imported flash drive.

OS: Windows

I start my app contains my USB driver and I plug-in my flash and its shows in Explorer that this drive is plugged and it is accessible, while that's happening, my app is checking that file data.txt EXIST if that file exist, program run next function, if not program, my program runs down/exit/!

Answer 1

If you are looking for a programmable USB dongle, I suggest inspecting this SO thread: Programmable USB dongles

Answer 2

The Windows Driver Kit should simplify your work or atleast help you at the start.