I look & test these examples. In the DVD, there is an another example: (19) MINI — USB Communication The documentation on the DVD is in Chinese - sick! :)
To discuss about the code, I propose to open another topic about these tests (Emulate USB Keyboard with STM32F103RB).
Tsuneo, Is it possible to contact you by email? (I would like to tell you some informations about my project that I cannot publish publicly)
Christian.