The Data Packet is a location in application storage where the physical mouse device driver returns the current device Status flags to the caller. The format of the Data Packet is as follows:
┌────────────────────────────────────────┐ │Field Length C Datatype │ ├────────────────────────────────────────┤ │Status Flags WORD USHORT │ └────────────────────────────────────────┘