The time of the event.
Pointer to a USBPACKET. Use it to manually parse all fields. See MFCSample for more details.
Total size of USBPACKET and all payload data. Equals to nSize variable:
ULONG nSize = packet->Size;
Set to TRUE if you don't need USBMC to parse this packet any more. That means that USBMC will not call methods like
OnUrb/OnGetDescriptorFromDevice/OnGetDescriptorFromEndpoint for this packet. That could be used for optimization if you manually parse URB packet.