USB Device Printer Function Driver Invalid Transfer Handle Definition 

This definition defines a USB Device Printer Function Driver Invalid Transfer Handle. A Invalid Transfer Handle is returned by the USB_DEVICE_Printer_Write and USB_DEVICE_Printer_Read functions when the request was not successful.

#define USB_DEVICE_PRINTER_TRANSFER_HANDLE_INVALID ((USB_DEVICE_PRINTER_TRANSFER_HANDLE)(-1))

None.