WinUSB communication with STM32 (Part 1: Intro)

Aren't you fed up with putting a USB to serial converter in your embedded design while you have a USB capable device already in the design? Any other approach opens a can of worms though. Custom driver, certificate to sign it, USB vendor ID (2000$ at the moment), how to communicate with device on a layer above USB? But it is nice when OS pops up your name when your device is plugged in USB port. WinUSB is middle ground with tradeoffs one might consider.

I wanted to test the use of WinUSB with STM32F103 for some time now. When I finally got time I created a demo project. It shows basic request - response communication.
WinUSB kernel mode driver enables raw communication through USB pipes. In other words you can communicate with your USB device directly from application on the PC. So there is only code for application and code for firmware. Presuming you are not making standard USB class device like Mass Storage or HID. You might not even need custom PC side software in this case.
Furthermore the libraries to communicate are written for both ends to some extent. There SetupAPI and WinUSB on Windows side while ST has libraries for everything.
To get a taste check images below. I will post more about it in the future and probably publish the sources after I clean and organize them.

VS showing sent data.

winIDEA showing same received data on STM32.

This is the first post in this series (of total 4 posts). See  2, 3, 4.

[Update - I have a new WinUSB device project with STM32F407 without the need for Windows side driver info (.inf and .cat files) ]